Free MCQs & Online Quiz Practice for Exams

Q: Three equal resistors that have equivalent resistance R/3 when in parallel, when connected in series their equivalent resistance is: (Entry test 2012)

A) R/3

B) R

C) 2R

D) 3R

Q: The magnetic force acting on a unit charge moving perpendicular to the magnetic field with unit velocity is called (Entry test 2006)

A) Magnetic induction

B) Magnetic permeability

C) Magnetic flux

D) Permittivity

Q: A hydrogen atom that has lost its electron is moving east in a region where the magnetic field is directed south to north. It will be deflected: (Entry test 2016)

A) Up

B) Down

C) North

D) South

Q: Heating a magnet, its magnetization will: (Entry test 2002)

A) Weaken it

B) Strengthen it

C) Reverse its polarity

D) Have no effect

Q: The temperature at which the resistance of a conductor approaches zero is called: (Entry test 2010)

A) Normal temperature

B) Critical temperature

C) Absolute temperature

D) Curie temperature

Q: In CRO, the time-base circuit is connected to: (Entry test 2010)

A) Vertical plates

B) Electron gun

C) Horizontal plates

D) Fluorescent screen

Q: A wire of length 10 cm lying normal to a magnetic field of 0.5 T experiences a force of 5 N. The current in the wire is: (Entry test 2010)

A) 10 A

B) 50 A

C) 100 A

D) 500 A

Q: The SI unit of magnetic flux is Weber which is equal to: (Entry test 2011)

A) N m A⁰

B) N m² A⁻¹

C) N A m⁻¹

D) N m A⁻²

Q: Two parallel metallic wires carry currents in the same direction. The wires will: (Entry test 2011)

A) Attract each other

B) Repel each other

C) No force

D) Remain stationary

Q: When a charged particle enters a uniform magnetic field, which quantity changes? (Entry test 2011)

A) Kinetic energy

B) Magnitude of velocity

C) Direction of velocity

D) All of these

Q: If the initial velocity of a charged particle is neither along nor perpendicular to the magnetic field, its path will be: (Entry test 2011)

A) Circle

B) Helix

C) Ellipse

D) Straight line

Q: The unit henry is equivalent to: (Entry test 2009)

A) Volt-second/ampere

B) Volt/second

C) Ohm

D) Ampere volt/second

Q: The phenomenon used for producing emf in the coil of a generator is: (Entry test 2009)

A) Mutual induction

B) Self induction

C) Electrostatic induction

D) Electromagnetic induction

Q: A Wheatstone bridge is used to determine an unknown: (ETEA 1998)

A) Current

B) Charge

C) Resistance

D) EMF

Q: Ohm × Farad is equal to: (Entry test 2011)

A) Second

B) Weber

C) Henry

D) Tesla

Q: The device used for detection and measurement of electric current is called: (Entry test 2002)

A) Transformer

B) Amplifier

C) Rectifier

D) Galvanometer

Q: A flat coil of wire having 5 turns has inductance L. The inductance of a similar coil having 20 turns is: (Entry test 2015)

A) 4L

B) 1/4 L

C) μL

D) L

Q: The changing electric flux in a certain region of space produces (Entry test 2016)

A) An electric field

B) Magnetic field

C) Both a and b

D) None

Q: Instantaneous emf E = 20 sin(100πt). The frequency of the alternating current is (Entry test 2015)

A) 100 Hz

B) 200 Hz

C) 50 Hz

D) 150 Hz

Q: The capacitive reactance of an AC circuit increases (Entry test 2010)

A) By increasing the frequency of AC voltage

B) By decreasing the frequency of AC voltage

C) Does not depend upon the frequency of AC voltage

D) None