Friday , 21 October 2016

Guess Papers for FSC Pre Engineering Part 2 2016

Guess Papers for FSC Pre Engineering Part 2 2016

Physics MCQs Guess Paper FSC 12th Class 2016

DAe education provide you latest Physics MCQs Guess Paper FSC 12th Class 2016 here you can find all guess papers for all subject.

Physics MCQs Guess Paper FSC 12th Class 2016

Note: (Physics MCQs Guess Paper FSC 12th Class 2016) All published material contains an informatory data which is only gathered for educational purpose. These guesses are prepared after detailed analysis of past five years exams. Our entire team and/or publishers are not responsible in case of variation in assumed results and outcomes. However the purposes of attempted efforts are to provide accurate and effective knowledge to the readers, in any case our entire team and/or publishers will not be responsible for the accuracy or misusage of all published material.

Guess Paper of Physics FSC Part 2 Important MCQs Questions

The highest value reached by voltage or current in one cycle is called
(A) Peak to peak value
(B) Peak value
(C) Instantaneous value
(D) Root mean square value

A detector which can count fast and operated low voltage is
(A) G.M. Counter
(B) Solid state detector
(C) Wilson cloud chamber
(D) bubble chamber

In a pure inductive A.C. circuit the current
(A) Lags behind voltage by 90°
(B) Leads the voltage by 90°
(C) In phase with voltage
(D) Leads the voltage by 270°

The A.0 circuit in which current and voltage are in phase, the power factor is
(A) zero
(B) 1
(C) 0.5
(D) infinity

Which factor does not affect the conductivity of PN-junction diode
(A) Doping
(B) Temperature
(C) Voltage
(D) Pressure

The output voltage of a rectifier is
(A) Smooth
(B) Pulsating
(C) Perfectly direct
(D) Alternating

The most common source of an A.C. voltage is
(A) Motor
(B) Cell
(C) Generator
(D) Thermocouple

If fingers of right hand show the direction of magnetic field and palm shows the direction of force then thumb points for
(A) Torque
(B) Voltage
(C) Current
(D) Inducted emf

In pure resistive A.C. circuit, instantaneous value of voltage or current
(A) Current lags behind voltage
(B) Current leads voltage by
(C) Both are in phase
(D) Voltage leads current by

The radius of atom is of the order of
(A) 101° m
(B) 10-1° m
(C) 10-14m
(D) 1014 m

Laser can only be produced of a atom is in its
(A) Normal state
(B) Excited state
(C) Ionized state
(D) De-excited state

The number of protons is any atom are always equal to number of
(A) Electron
(B) Neutron
(C) Positron
(D) Mesons

The radius of 3 Bohr orbit in hydrogen atom is greater tlian the radius of 1st orbit by a factor of
(A) 2
(B) 3
(C) 4
(D) 9

The emission of x-rays leave the atom of the target in
(A) Ground state
(B) Excited state
(C) Double ionized state
(D) Single ionized state

Energy of the 4th orbit in hydrogen atom is
(A) —2.51 ev
(B) —3.50 ev
(C) —13.6 ev
(D) —0.85 ev

The number of protons in an atom are always equal to number of
(A) Electrons
(B) Neutrons
(C) Positron
(D) Mesons

Conversion of A.C. into D.C. is called
(A) Modulation
(B) Amplification
(C) Oscillation
(D) Rectification

The frequency of A.C. source used in Pakistan is
(A) 50 Hz
(B) 60 Hz
(C) 45 Hz
(D) 70 Hz

The basic circuit element in A.C. circuit which controls current
(A) Resistor only
(B) Capacitor only
(C) Inductor only
(D) All of these

At high frequency, the current through a capacitor of A.C. circuit will be
(A) Large
(B) Small
(C) Infinite
(D) Zero

The device which allows only the continuous flow of an A.C. through a circuit is
(A) Capacitor
(B) Inductor
(C) D.C. Motor
(D) Battery

Which one of the following is not present in A.C. generator?
(A) Armature
(B) Magnet
(C) Slip rings
(D) Commutator

The mutual induction plays role in
(A) Generator
(B) Galvanometer
(C) Transformer
(D) D.C. motor

The capacitive reactance to pure D.C. is
(A) Zero
(B) Infinite
(C) Variable
(D) Equal to inductive reactance

The electric field created by positive charge is
(A) Radially outward
(B) Radially inward
(C) Circular
(D) Zero

Electrical energy is measured
(A) Walt
(B) Horse Power
(C) Kilowatt
(D) Kilowatt hour

The component in a generator which consumes electrical energy is called
(A) Capacitor
(B) Load
(C) Split rings
(D) Commulator

Two opposite point charge of same magnitude separated by distance 2d, electric potential mid-way, between them is
(A) 1 V
(B) 2 V
(C) Zero
(D) —V

The concept of an electric field lines is introduced by
(A) Coulomb
(B) Faraday
(C) Einstein
(D) Joseph Henry

Production of X-rays is reverse process of
(A) Photo-electric effect
(B) Compton effect
(C) Annihilation
(D) Pair production

The winding of the electromagnet in motor are usually called
(A) Magnetic coils
(B) Field coils
(C) Electric coils
(D) Electric-o-electric coils

In a capacitor energy is stored in the
(A) Magnetic field
(B) Electric field
(C) Gravitational field
(D) Nuclear field

Which is true for both a-particles and y-rays
(A) They cause ionization in air
(B) They can be deflected by electric field
(C) They can be deflected by magnetic field
(D) They can penetrate a few millimeter of aluminum

Number of electrons emitted in photoelectric effect depends upon
(A) Intensity of incident light
(B) Frequency of incident light
(C) Energy of incident light
(D) Wavelength of incident light

Which is not true for x-rays
(A) X-rays are not deflected by electric field
(B) X-rays are polarized
(C) X-rays consist of electromagnetic waves
(D) X-rays can be diffracted by grating

The reverse process of photo-electric effect is
(A) Compton effect
(B) X-rays production
(C) pair production
(D) pair annihilation

For the computation of electric flux, the surface area should be
(A) Flat
(B) Curved
(C) Inclined
(D) Spherical

SI unit of electric flux is
(A) N — mC-2
(B) N — m2C-1
(C) N Cm-2
(D) N — C2m2

Electric current produces magnetic field was suggested by
(A) Faraday
(B) Oersted
(C) Henry
(D) Lenz

Presence of dielectric always
(A) Increases the electrostatic force
(B) Reduces the electrostatic force
(C) Does not affect the electrostatic force
(D) Doubles the electrostatic force

The direction of induced current is always so as to oppose the change which causes the current is
(A) Faraday’s law
(B) Lenz’s law
(C) Ohm’s law
(D) Kirchoffs 1st rule

The principle of an alternating current generator is based on
(A) Coulomb’s law
(B) Ampere’s law
(C) Faraday’s law
(D) Lenz’s law

The working principle of transformer is
(A) Self induction
(B) Faraday’s law
(C) Mutual induction
(D) Electromagnetic induction

The graphical representation of Ohm’s law is
(A) Hyperbola
(B) Ellipse
(C) Parabola
(D) Straight line

Joule-second is the unit of
(A) Energy
(B) Wein’s constant
(C) Planck’s constant
(D) Boyle’s law

Lenz’s law is in accordance with the law of conservation of
(A) Momentum
(B) Charge
(C) Angular momentum
(D) Energy

The ratio of applied stress to volumetric strain is called
(A) Young’s modulus
(B) Shear modulus
(C) Bulk modulus
(D) Tensile modulus

The SI unit of stress is the same as that of
(A) Momentum
(B) Pressure
(C) Force
(D) Length

The ability of a body to return to its original shape is called
(A) Strain
(B) Stress
(C) Elasticity
(D) Plasticity

When a stress changes the shape of a body, it is called
(A) Volumetric stress
(B) Shear stress
(C) Tensile stress
(D) Compressional stress

Tolerance for silver band is
(A) ± 10%
(B) ± 15%
(C) ± 20%
(D) ± 25%

If the resistance of 500 Q have fourth band of silver colour then its upper maximum resistance will be
(A) 600 Q
(B) 550 0
(C) 450 Q
(D) 400 Q

Which of the following series lies in the ultraviolet region?
(A) Lyman series
(B) Balmer series
(C) Pfund series
(D) Bracket series

Balmer series lies in
(A) Ultraviolet region
(B) Visible region
(C) Infra red region
(D) All of these

Which one of the following requires a material medium for their propagation?
(A) Heat waves
(B) X-rays
(C) Sound waves
(D) Ultraviolet rays

The torque on Cement Carrying Coil is
(A) T = NIAB cos a
(B) T = BIL sin a
(C) T = NIAB sin a
(D) T = BIL cos a

Torque on a current carrying coil is given by
(A) ILB cos a
(B) ILB sin a
(C) IBA,cos a
(D) IBA sin a

Sensitivity of a galvanometer can be increased by
(A) Decreasing the value of torsional couple
(B) Decreasing number of turns
(C) Decreasing area of plane of coil
(D) Decreasing magnetic field

In 1905, the special theory of relativity was proposed by
(A) Maxwell
(B) de-Broglie
(C) Bohr
(D) Einstein

Einstein presented special theory of relativity in
(A) 1850
(B) 1920
(C) 1905
(D) 1932

The anode in the CRO is
(A) Control no. of waves
(B) Control brightness of spot formed
(C) Accelerates and focus the beam
(D) At negative potential with respect to cathode

The brightness of the spot on CRO screen is controlled by
(A) Anode
(B) Cathode
(C) Grid
(D) Deflecting plates

An avometer can also be called as
(A) Digital ammeter
(B) Digital CRO
(C) Digital voltmeter
(D) Multi mate

A potential barrier of 0.7 volt exist across p-n junction made from
(A) Silicon
(B) Germanium
(C) Indium
(D) Gallium

Nm-2 is called
(A) Ohm
(B) Ampere
(C) Volt
(D) Pascal

Which of is used to determine the interval resistance of a cell
(A) Ammetei
(B) Voltmeter
(C) Galvanometer
(D) Potentiometer

An avometer is also called
(A) An ammeter
(B) A voltmeter
(C) A multimeter
(D) An ohm-meter

When a small resistance is connected parallel to the galvanometer, the resulting is
(A) Voltmeter
(B) Wheatstone bridge
(C) Ammeter
(D) Potentiometer

One weber is equal to
(A) NA-1
(B) Nm-1 A
(C) NmA -1
(D) Nm-1A-1

The unit of magnetic flux is
(A) Curie
(B) Weber
(C) Newton
(D) Farad

If the motor is overloaded, then the magnitude of Back error
(A) Increases
(B) Decreases
(C) Constant
(D) Becomes zero

The central region of a transistor is called
(A) Base
(B) Emitter
(C) Collector
(D) Neutral

Transistors are made from plastics
(A) Metals
(B) Insulator
(C) Doped
(D) Semi conductor

Direct current cannot flow through
(A) Inductor
(B) Resistor
(C) Transistor
(D) Capacitor

The thickness of base in a transistor is of the order of
(A) 10-3m
(B) 10-9m
(C) 10-6m
(D) 10-6mm

The base in a transistor is of the order of
(A) 10-6m
(B) I 0-4m
(C) em
(D) 10-m

Base of the transistor is very thin of the order of
(A) 10-2 m4
(B) 10 m
(C) le m
(D) 104 m

When a P-N junction is reverse biased, the depletion region is
(A) Widened
(B) Narrowed
(C) Normal
(D) No change

Joule hyper second is the unit of
(A) Energy
(B) Heat
(C) Plank’s constant
(D) Work

In case of capacitor the unit of its reactance is
(A) Farad
(B) Ohm
(C) Moh
(D) Henry

The algebraic sum of potential, changes for a closed circuit is
(A) Positive
(B) Negative
(C) Zero
(D) Greater than unity

Siemem is the unit of
(A) Resistance
(B) Conductance
(C) Resistivity
(D) Conductivity

The S.I unit of magnetic flux is given by
(A) NmA-1
(B) NA-1m-1
(C) Nm2A-1
(D) Nrn-1A

The momentum of the moving photon is
(A) Zero
(B) P
(C) P = —
(D) P = X —

Which light photon has the least momentum
(A) Red
(B) Blue
(C) Yellow
(D) Green

A positron is an antiparticle of
(A) Proton
(B) Electron
(C) Neutron
(D) Photon

A pair of quark and antiquark makes
(A) Meson
(B) Baryon
(C) Photon
(D) Proton

The physical quantity related to photon that does not change in Compton scattering is
(A) Energy
(B) Speed
(C) Frequency
(D) Wavelength

X-rays photon moves with the velocity of
(A) Light
(B) Less than light
(C) Greater than light
(D) Sound

Two down and one up quarks make
(A) Proton
(B) Neutron
(C) Photon
(D) Positron

Strong nuclear force acts on
(A) Meson only
(B) Pions only
(C) Photons only
(D) Hadrons only

Which of the following have no charge?
(A) ot-rays
(B) p-rays
(C) y-rays
(D) Cathode rays

Charge on an electron was determined by
(A) Ampere
(B) Maxwell
(C) Milikan
(D) Neil Bohr

A magnetic field acts on a charged particle so as change
(A) speed
(B) Energy
(C) Direction of motion
(D) All of these

In Helium-Neon laser, discharge tube is filled with Neon gas
(A) 10%
(B) 15%
(C) 85%
(D) 90%

Choke consumes extremely small
(A) Current
(B) Charge
(C) Power
(D) Potential

The velocity of an oscillating charge as it moves to and fro along a wire is
(A) Changing
(B) Constant
(C) Infinite
(D) Zero

The charge on f3-particle is
(A) +e
(B) —e
(C) +2e
(D) None of these

A particle carrying a charge of 2e falls through potential difference of 3v. Energy acquired by it is
(A) 9.6 x 10-16J
(B) 9.6 x 10-29.1
(C) 9.6 x 10-15 J
(D) 9.6 x 10-19 J

If the medium between the charges is not free space then electrostatic force will
(A) Increase
(B) Decrease
(C) Remain same
(D) None of these

If an electron of charge is accelerated through a potential difference V, it will acquire energy
(A) Ve
(B) VA
(C) %
(D) Vet

Fluorescence is the property of
(A) High frequency particles
(B) Moderate frequency particles
(C) Low frequency particles
(D) Visible light

If a platinum wire is heated at 500° C, then it appears as
(A) White
(B) Yellow
(C) Orange red
(D) Dull red

Universal gate is the gate which can perform the function of
(A) Buffer gate
(B) Any logic gate
(C) Any basic gate
(D) Any exclusive gate

At high frequency, RLC series circuit shows the behaviour of
(A) Pure inductive circuit
(B) Pure resistive circuit
(C) Pure capacitive circuit
(D) Pure RLC circuit

In photovoltaic cell, current is directly proportional to
(a) Wavelength of light
(b) Intensity of light
(c) Frequency of light
(d) Energy

Grid in cathode ray oscilloscope controls
(A) Number of electrons
(B) Temperature of filament
(C) Frequency of electrons
(D) Energy of electrons

At resonance frequency, the impedance of RLC series circuit is
(A) Zero
(B) Minimum
(C) Maximum
(D) Moderate

Maximum emf generated in a generator is
(A) co = c sin 0
(B) & = co sin 0
(C) E = N co AB sin 0
(D) co = N (DAB

Which one is not present in A.0 generator?
(A) Armature
(B) Magnet
(C) Slip rings
(D) Commutator

Energy density in case of a capacitor is always proportional to
(A) E2
(B) so
(C) V2
(D) C

If magnetic field is doubled then magnetic energy density becomes
(A) Four times
(B) Two times
(C) Three times
(D) Six times

By using NAVSTAR speed of an object can now be determined to an accuracy of
(A) 20 cm/sec
(B) 760 cm/sec
(C) 50 cm/sec
(D) 2 cm/sec

At resonance RLC series circuit shows the behaviour of
(A) Pure resistive circuit
(B) Pure capacitive circuit
(C) Pure inductive circuit
(D) Pure RLC circuit

The circuit which changes input signals at output with phase shift at 180°C is called
(A) Amplifier
(B) Inverter
(C) Switch
(D) Operational amplifier

The net reactance of a circuit is zero. The circuit may consist of
(A) An indicator only
(B) Capacitor only
(C) Both indicator and capacitor
(D) None

The impedance of RLC series circuit at resonance is given by
(A) Z = VR2 + (X, — Xc )2
(B) Z = VR2 X,2
(C) Z = R
(D) Z = -\/R2 Xc2

The substances with conductivities between 10-1° and 10-2o (c2 m) are called
(A) Super conductors
(B) Insulators
(C) Semi conductors
(D) Conductors

Magnetic potential energy stored in an inductor depends upon
(A) Under root of the value of current
(B) Cube root of the value of current
(C) Cube of the value of current
(D) Square of the value of current

In black body radiation’s at low temperature a body emits radiations of
(A) Long wavelength
(B) Small wavelength
(C) Medium wavelength
(D) High energy

The amount of energy released in the fusion of four hydrogen nuclei form an alpha particle is equal to
(A) 2 Mev
(B) 25 Mev
(C) 100 Mev
(D) 200 Mev

Energy of each positron is given by
(A) 2 MeV
(B) 1.02 MeV
(C) 0.51 MeV
(D) 5 MeV

Binding energy for deuteron nucleus is given by
(A) 2.8 Mev
(B) 2.23 Mev
(C) 2.28 Mev
(D) 2.25 Mev

The rest mass energy of an electron positron pair is
(A) 0.51 Mev
(B) 1.02 Mev
(C) 1.2 Mev
(D) 1.00 Mev

The work is stored in an inductor as
(A) Kinetic energy
(B) Elastic potential energy
(C) Magnetic potential energy
(D) Gravitational potential energy

The amount of energy acquired or lost by an alpha particle as it moves through p.d. of 1 V is
(A) 3.2 x 10-19J
(B) 6.4 x 10-19J
(C) 1.6 x 10-19J
(D) Zero

The substance having negative temperature co-efficient is
(A) Carbon
(B) Iron
(C) Tungsten
(D) Gold

Fractional change in resistance per Kelvin rise in temperature is called
(A) Conductance
(B) Resistance
(C) Resistivity
(D) Temperature

The value of temperature coefficient of resistance of most thermistor
(A) Positive
(B) Negative
(C) Zero
(D) Infmity

The resistivity of a conductor increase with
(A) Increase in its length
(B) Increase in its area
(C) Increase in its temperature
(D) Decrease in its length

Specific resistance of a material depends upon
(A) Length
(B) Area
(C) Temperature
(D) Both A & B

Resistivity at a given temperature depends upon
(A) Area of cross section
(B) Length
(C) Nature of material of conductor
(D) Both length and area

Cathode ray oscilloscope works by deflecting a beam of
(A) Neutrons
(B) Protons
(C) Electrons
(D) Positrons

X-rays are similar in nature to
(A) Alpha rays
(B) Beta rays
(C) Cathode rays
(D) Gamma rays

X-rays are electromagnetic having wavelength in range
(A) 102m
(B) 10m
(C) 10xm
(D) 10-6m

Potassium cathode in photocell emit electrons for a light
(A) Visible
(B) Infra-red
(C) Ultra violet
(D) X-rays

X-rays can be
(A) Reflected
(B) Diffracted
(C) Polarized
(D) All of these

A light emitting diode (LED) emits light only when
(A) Reverse biased
(B) Forward biased
(C) Unbiased
(D) None of these

Light emitting diodes (LED) are made from semi-conductors
(A) Silicon
(B) Germanium
(C) Carbon
(D) Gallium arsenide

Life time of meta stable state is
(A) le s
(B) 10-3s
(C) 10-8s
(D) 10-2s

Which one belongs to Lepton’s group
(A) Electron
(B) Muons
(C) Neutrinos
(D) All of these

Equation (1) = EX is applicable to a surface
(A) Spherical
(B) Cylindrical
(C) Conical
(D) Flat

The inductance can be increased by winding the wire around a core made of
(A) Copper
(B) Silicon
(C) Iron
(D) Aluminum

Which of the following has the least hysteresis loop area
(A) Steel
(B) Wrought iron
(C) Soft iron
(D) Cobalt

The open loop gain of the amplifier is order of
(A) 102
(B) 108
(C) 105
(D) 1012

Mass of meson is
(A) Greater than proton
(B) Less than proton
(C) Equal to proton
(D) Equal to neutron

The rest mass of an electron is
(A) 6.7 MeV
(B) 5.11 MeV
(C) 0.511 MeV
(D) 0.051 MeV

Which one is used to study the circulation of blood?
(A) Iodine-131
(B) Sodium-24
(C) Cobalt-60
(D) Strontium-90

Which one is not a ferromagnetic substance?
(A) Cobalt
(B) Copper
(C) Nickle
(D) Iron

Which one is a photo conductor?
(A) Copper
(B) Selinium
(C) Mercury
(D) Aluminium

Which one pair belongs to accepter impurity
(A) Arsenic, phosphorus
(B) Boron, gallium
(C) Antimony, indium
(D) Arsenic, antimony

Which one is pentavalent impurity?
(A) Boron
(B) Gallium
(C) Antimony
(D) Indium

Potential difference across two terminal of silicon diode at 300 k is
(A) 0.3 V
(B) 0.7 V
(C) 0.9 V
(D) 1.2 V

If the number of turns become double but length remain same, then magnetic field in the solenoid become
(A) Half
(B) Double
(C) Remain same
(D) Zero

Commutator was invented in
(A) 1736
(B) 1834
(C) 1935
(D) 1885

Which one of the following is crystalline solid
(A) Zirconia
(B) Glassy solid
(C) Natural rubber
(D) Polystrene

The value of Wien’s constant is
(A) 2.9×10-3mK
(B) 2.9x103mK
(C) 5.67x 10-8mK
(D) 5.67×10-8wm-2K-4

Einstein was awarded Nobel Prize in Physics in
(A) 1905
(B) 1911
(C) 1918
(D) 1921

Whenever current is drawn from cell its terminal potential difference and e.m.f. becomes
(A) Different
(B) Same
(C) Zero
(D) Negative

A Rheostat can operate as a
(A) Transformer
(B) amplifier
(C) oscillator
(D) potential divider

The number of isotopes of caesium are
(A) 4
(B) 32
(C) 36
(D) 22

The product of resistance and capacitance is
(A) Velocity
(B) Force
(C) Acceleration
(D) Time

The e/m of a neutron is
(A) Less than electron
(B) Greater than electron
(C) Zero
(D) The same as electron

The building blocks of protons of neutrons arc called
(A) VIons
(B) Electrons
(C) Positrons
(D) Quarks

When a radioactive nucleus emits a 13 particle the proton and neutron ratio
(A) Remain the same
(B) Increases
(C) Decreases
(D) Equals

The peak value of A.0 source is 20 A, then its rms valtie will be
(A) 14.1 A
(B) 10 A
(C) 20 A
(D) 28.2 A

A proton consists of quarks which are
(A) Two up, one down
(B) One up, two down
(C) All up
(D) All down

Free electrons are
(A) Tightly bound
(B) Fixed
(C) Closely bound
(D) Tightly fixed

Glass and high carbon steel are example of
(A) Vductile substances
(B) Brittle substances
(C) Soft material
(D) Hard material

The division and germer experiment indicates
(A) Interference
(B) Polarization
(C) Electron diffraction
(D) Refraction

A system which deals with quanitities or variables which have only two iscrete value or state called
(A) Digital system
(B) Automatic system
(C) Logic system
(D) None

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