Physics MCQs

Option A: Commutative law

Option B: Distributive law

Option C: Associative law

Option D: All given laws in A, B and C

Correct Answer: All given laws in A, B and C ✔

Option A: Its electric field

Option B: Its coils

Option C: Its magnetic field

Option D: Both electric and magnetic fields

Correct Answer: Its magnetic field ✔

Option A: Each increase

Option B: Each decrease

Option C: Each remains the same

Option D: One increases whereas that in the other decreases

Correct Answer: Each decrease ✔

Option A: V√/√2R

Option B: V/√2√R

Option C: V02/√2R

Option D: 2/√2√R

Correct Answer: V02/√2R ✔

Option A: V = VR+VL+VC

Option B: V2 = VR2+VL2+VC2

Option C: V2 = VR2+(VL-VC)2

Option D: V2 = VL2+(VR-VC)2

Correct Answer: V2 = VR2+(VL-VC)2 ✔

Option A: Zero

Option B: 45°

Option C: 90°

Option D: 180°

Correct Answer: Zero ✔

Option A: Peak values of voltage and current

Option B: Effective values of voltage and current

Option C: Instantaneous values of voltage and current

Option D: All of the above

Correct Answer: All of the above ✔

Option A: 10mH

Option B: 12mH

Option C: 16mH

Option D: 20mH

Correct Answer: 16mH ✔

Option A: 1Ω

Option B: 5Ω

Option C: 7Ω

Option D: 7Ω

Correct Answer: 5Ω ✔

Option A: Zero

Option B: 2

Option C: 1

Option D: Not definite

Correct Answer: 1 ✔

Option A: DC circuit

Option B: AC circuits

Option C: Both AC and DC circuit

Option D: Full wave rectifier circuit

Correct Answer: AC circuits ✔

Option A: 220V

Option B: 220/ 2V

Option C: 110V

Option D: 220 √2V

Correct Answer: 220 √2V ✔

Option A: C/R

Option B: R/C

Option C: 1/RC

Option D: 1/ 2RC

Correct Answer: 1/RC ✔

Option A: 0.5 mH

Option B: 0.5H

Option C: 2.0H

Option D: 8.0H

Correct Answer: 0.5H ✔

Option A: Same

Option B: Different

Option C: At L will be more than at C

Option D: At L will be less than at C

Correct Answer: Same ✔

Option A: The exact value of the current

Option B: RMS value of the current

Option C: The net value of the current

Option D: The peak value of the current

Correct Answer: RMS value of the current ✔

Option A: (R+2πfL)

Option B: R+1/2πfL

Option C: (R2+f2L2)

Option D: (R2+4π2f2L2)

Correct Answer: (R2+4π2f2L2) ✔

Option A: Remains same

Option B: Brightness increases

Option C: Brightness decreases

Option D: No light

Correct Answer: Brightness increases ✔

Option A: 32Ω

Option B: 62Ω

Option C: 50Ω

Option D: 100Ω

Correct Answer: 32Ω ✔

Option A: Lags behind voltage by π/2

Option B: Is in phase with voltage

Option C: Opposite in phase of voltage by π

Option D: Leads forward the voltage by π/2

Correct Answer: Leads forward the voltage by π/2 ✔

Option A: The current lead voltage by phase angle is 90 degrees

Option B: The voltage leads current by phase angle is 90 degrees

Option C: The current lead voltage by phase angle is 45 degrees

Option D: The voltage leads current by phase angle is 45 degrees

Correct Answer: The current lead voltage by phase angle is 90 degrees ✔

Option A: Lagging each other

Option B: They are at 90? phase difference

Option C: They have zero phase difference

Option D: No phase difference

Correct Answer: They have zero phase difference ✔

Option A: I = 2I∫Sin(πt/2)

Option B: I = 2I∫Sin(2πt)

Option C: I = 2ISinπt

Option D: I = I∫sin(2πt)

Correct Answer: I = 2I∫Sin(2πt) ✔

Option A: Mean value of I2

Option B: Square root of mean value of I2

Option C: Square root of I2

Option D: Square of 1/2

Correct Answer: Square root of mean value of I2 ✔

Option A: 0.9sec

Option B: 15 sec

Option C: 1.5x105sec

Option D: 0.9x102sec

Correct Answer: 0.9sec ✔

Option A: Stationary

Option B: Longitudinal

Option C: Transverse

Option D: All the above

Correct Answer: Transverse ✔

Option A: Energy

Option B: Momentum

Option C: Mass

Option D: Heat

Correct Answer: Energy ✔

Option A: Perpendicular to electric field

Option B: Perpendicular to both electric and magnetic field

Option C: Perpendicular to magnetic field

Option D: Parallel to electric and magnetic field

Correct Answer: Perpendicular to both electric and magnetic field ✔

Option A: Magnetic field

Option B: Electric field

Option C: Electromagnetic force

Option D: Artificial gravitational field

Correct Answer: Electromagnetic force ✔

Option A: 20A

Option B: 20.66A

Option C: 6.66A

Option D: 5.66A

Correct Answer: 5.66A ✔

Option A: Average current

Option B: Sinusoidal current

Option C: r.m.s current

Option D: Net current

Correct Answer: r.m.s current ✔

Option A: Twice

Option B: One half

Option C: Four times

Option D: None

Correct Answer: One half ✔

Option A: Sound waves

Option B: Electromagnetic waves

Option C: Radio waves

Option D: Modulated waves

Correct Answer: Electromagnetic waves ✔

Option A: Electric and magnetic fields moving parallel to each other

Option B: Magnetic field moving with velocity of light in space

Option C: Electric field moving with velocity of light

Option D: Electric and magnetic fields moving perpendicular to each other

Correct Answer: Electric and magnetic fields moving perpendicular to each other ✔

Option A: λ-rays

Option B: Positive rays

Option C: Cathode rays

Option D: More than sound waves

Correct Answer: λ-rays ✔

Option A: fluctuates off and on

Option B: varies in magnitude alone

Option C: changes its direction again and again

Option D: changes its magnitude harmonically and reverses its direction of flow after regularly recurring intervals

Correct Answer: changes its direction again and again ✔

Option A: 4 volt

Option B: 5 volt

Option C: 2 volt

Option D: 0.4 volt

Correct Answer: 2 volt ✔

Option A: weaken it

Option B: strengthen it

Option C: reverse its polarity

Option D: demagnetize it completely

Correct Answer: weaken it ✔

Option A: very low damping

Option B: very high damping

Option C: no damping at all

Option D: radial field disintegration

Correct Answer: very low damping ✔

Option A: a straight line parallel to the field

Option B: a parabola in a plane perpendicular to the field

Option C: a circle in a plane perpendicular to the field

Option D: a straight line along its initial direction

Correct Answer: a circle in a plane perpendicular to the field ✔

Option A: use a very long and fine suspension

Option B: use a coil of very large area

Option C: use a coil with very large number of turns

Option D: use a very strong magnetic field

Correct Answer: use a very strong magnetic field ✔

Option A: in series with the circuit

Option B: in parallel with circuit

Option C: in series with any of the parallel resistances in the circuit

Option D: in parallel with any of the series resistances in the circuit

Correct Answer: in series with the circuit ✔

Option A: a most sensitive galvanometer is used

Option B: a steady voltage cell is used

Option C: the balance point is close to the middle of the wire

Option D: a high resistance box is used in one of its gap

Correct Answer: the balance point is close to the middle of the wire ✔

Option A: 0.1 A

Option B: 1:00 AM

Option C: current sensitivity

Option D: 1 m A

Correct Answer: current sensitivity ✔

Option A: C/BAN

Option B: CAN/B

Option C: BAN/C

Option D: ABC/N

Correct Answer: C/BAN ✔

Option A: 18Ω

Option B: 30Ω

Option C: 24Ω

Option D: 12Ω

Correct Answer: 12Ω ✔

Option A: B = μNI

Option B: B = μN/I

Option C: B = μnI

Option D: Both B and C

Correct Answer: Both B and C ✔

Option A: 4πx10-9 WbA-1m-1

Option B: 4πx10-7 WbA-1m-1

Option C: 4πx10-10 WbA-1m-1

Option D: 4πx10-8 WbA-1m-1

Correct Answer: 4πx10-7 WbA-1m-1 ✔

Option A: a circle

Option B: a spiral

Option C: an ellipse

Option D: helix

Correct Answer: helix ✔

Option A: magnetic flux = flux density / area

Option B: magnetic flux = flux density x area

Option C: flux density = magnetic flux area

Option D: flux density = magnetic flux x area

Correct Answer: magnetic flux = flux density x area ✔

Option A: τ = NIAB cosφ

Option B: τ = NIAB sinφ

Option C: τ = NIAB tanφ

Option D: τ = NIAB

Correct Answer: τ = NIAB ✔

Option A: charge in motion

Option B: charge at rest

Option C: both

Option D: none

Correct Answer: charge in motion ✔

Option A: R=qB/mV

Option B: R=mV/qB

Option C: R=qmV/B

Option D: R=qmB/V

Correct Answer: R=mV/qB ✔

Option A: F=1/B

Option B: F=1/Bsinθ

Option C: F/0

Option D: F=1/Bcosθ

Correct Answer: F/0 ✔

Option A: be rotating

Option B: come to rest in N-S direction

Option C: vibrating like galvanometer needle

Option D: comes to rest after rotation

Correct Answer: come to rest in N-S direction ✔

Option A: independent mass m

Option B: directly proportional to m

Option C: directly proportional to q

Option D: directly proportional to B

Correct Answer: directly proportional to B ✔

Option A: maximum current flows through the galvanometer branch

Option B: minimum current flows through the galvanometer branch

Option C: potential difference across galvanometer branch is maximum

Option D: potential difference across galvanometer branch is zero

Correct Answer: potential difference across galvanometer branch is zero ✔

Option A: detect current in a circuit

Option B: measure current flowing through a circuit

Option C: measure voltage across a circuit

Option D: measure potential difference between two points in a circuit

Correct Answer: detect current in a circuit ✔

Option A: BINA cosa

Option B: BINA sina

Option C: BINA tana

Option D: BINA

Correct Answer: BINA ✔

Option A: 2.0 mA

Option B: 20 mA

Option C: 200 mA

Option D: 0.2 mA

Correct Answer: 2.0 mA ✔

Option A: shunt value decreases

Option B: shunt value increases

Option C: shunt value remains the same

Option D: none of the above

Correct Answer: shunt value decreases ✔

Option A: galvanometer

Option B: voltmeter

Option C: ammeter

Option D: AC transformer and DC generator

Correct Answer: AC transformer and DC generator ✔

Option A: zero

Option B: equal to the restoring couple

Option C: greater than the restoring couple

Option D: smaller than the restoring couple

Correct Answer: equal to the restoring couple ✔

Option A: voltmeter

Option B: galvanometer

Option C: cathode ray oscilloscope (CRO)

Option D: ammeter

Correct Answer: cathode ray oscilloscope (CRO) ✔

Option A: E = BeV

Option B: B = eE/V

Option C: E = BV

Option D: E = BeV/2

Correct Answer: E = BV ✔

Option A: M

Option B: L

Option C: H

Option D: B

Correct Answer: L ✔

Option A: NA-1m-1

Option B: NAm-1

Option C: NmA-1

Option D: NmA-2

Correct Answer: NA-1m-1 ✔

Option A: 1T = 103 G

Option B: 1T = 10-4 G

Option C: 1T = 10-2 G

Option D: 1T = 104 G

Correct Answer: 1T = 104 G ✔

Option A: air

Option B: steel

Option C: Cu-Ni alloy

Option D: soft iron

Correct Answer: soft iron ✔

Option A: always exerts a force on a charged particle

Option B: never exerts a force on a charged particles

Option C: exerts a force if the charged particle is moving in the direction of the magnetic field lines

Option D: exerts a force if the charged particle is moving perpendicular to the magnetic field lines

Correct Answer: exerts a force if the charged particle is moving perpendicular to the magnetic field lines ✔

Option A: repel each other

Option B: attract each other

Option C: have no effect upon each other

Option D: they cancel out their individual magnetic fields

Correct Answer: repel each other ✔

Option A: 1A

Option B: 10A

Option C: 100A

Option D: 1000A

Correct Answer: 100A ✔

Option A: magnetic flux

Option B: magnetic field intensity

Option C: magnetic induction

Option D: self inductance

Correct Answer: magnetic induction ✔

Option A: Positive

Option B: Negative

Option C: Both positive and negative

Option D: Neutral

Correct Answer: Neutral ✔

Option A: Holes only

Option B: Electrons only

Option C: Electron and holes both

Option D: All of the above

Correct Answer: Electron and holes both ✔

Option A: Conductors

Option B: Insulators

Option C: Semi conductors

Option D: All of the above

Correct Answer: Semi conductors ✔

Option A: Face centred cubic

Option B: Body centred cubic

Option C: Simple cubic

Option D: All of the above

Correct Answer: Face centred cubic ✔

Option A: Transport vibrations

Option B: Transport signals

Option C: Transport charge

Option D: Transport impulses

Correct Answer: Transport charge ✔

Option A: Conduction band

Option B: Valence band

Option C: Forbidden band

Option D: Empty band

Correct Answer: Conduction band ✔

Option A: Force corners

Option B: Nine corners

Option C: Eight corners

Option D: Six corners

Correct Answer: Eight corners ✔

Option A: Cleavage

Option B: Symmetry

Option C: Isotropy

Option D: Homogeneity

Correct Answer: Cleavage ✔

Option A: Polymerization

Option B: Cleavage

Option C: Microstructure

Option D: Dislocation

Correct Answer: Microstructure ✔

Option A: Demagnetization

Option B: Breakage

Option C: Extension

Option D: Surface cracking

Correct Answer: Demagnetization ✔

Option A: Semi-conductor becomes conductors

Option B: Ferromagnetic becomes paramagnetic

Option C: Paramagnetic becomes diamagnetic

Option D: Metals become super conductor

Correct Answer: Ferromagnetic becomes paramagnetic ✔

Option A: Stiffness

Option B: Toughness

Option C: Extension

Option D: Deformation

Correct Answer: Deformation ✔

Option A: (F1+F2) (121+122)

Option B: (F1+F2) (122-112)

Option C: (F1+F2) (12-11)

Option D: (F1+F2) (12-11)

Correct Answer: (F1+F2) (12-11) ✔

Option A: Brittle

Option B: Ductile

Option C: Amorphous

Option D: Polymers

Correct Answer: Ductile ✔

Option A: 0.025J

Option B: 0.50J

Option C: 0.75J

Option D: 0.100J

Correct Answer: 0.75J ✔

Option A: 2×108 Nm-2

Option B: 5×106 Nm-2

Option C: 0.5×10-6 Nm-2

Option D: 0.2×10-6Nm-2

Correct Answer: B. 5×106 Nm-2 ✔

Option A: Nm-2

Option B: Jm-2

Option C: Nm-1

Option D: Being a number it has no unit.

Correct Answer: Nm-2 ✔

Option A: Hysteresis curve

Option B: Hysteresis loop area

Option C: Hysteresis loop

Option D: Straight line

Correct Answer: Hysteresis loop area ✔

Option A: Squids

Option B: Magnetic resonance imaging (MRI)

Option C: Magnetometer

Option D: Oscilloscope

Correct Answer: Squids ✔

Option A: A party filled valence band and totally empty conduction band

Option B: A completely filled valence band a totally empty conduction band and a very wide forbidden band

Option C: A completely filled valence band a partially filled conduction band and a narrow forbidden band

Option D: A partly filled valence band a totally empty conduction band and a wide forbidden band

Correct Answer: A completely filled valence band a partially filled conduction band and a narrow forbidden band ✔

Option A: Decreases

Option B: Increases

Option C: Remains same

Option D: First increases then decreases

Correct Answer: Increases ✔

Option A: Semi conductor

Option B: Conductor

Option C: Metals

Option D: Non metals

Correct Answer: Non metals ✔

Option A: Conduction band

Option B: Valence band

Option C: Forbidden band

Option D: Core band

Correct Answer: Core band ✔

Option A: Electrical insulators alone

Option B: Electrical conductors alone

Option C: Electrical semi conductors alone

Option D: All of the above

Correct Answer: All of the above ✔

Option A: Symmetry

Option B: Homogeneity

Option C: Isotropy

Option D: Cleavage

Correct Answer: Homogeneity ✔

Option A: Isotropy

Option B: Cleavage

Option C: Homogeneity

Option D: The external symmetry of form

Correct Answer: The external symmetry of form ✔

Option A: Semi conductor

Option B: Super conductors

Option C: Insulators

Option D: Conductor

Correct Answer: Insulators ✔