Electromagnetism Mcqs

Our collections of Multiple choice questions and answers focuses on study of Electromagnetism in Physics. These questions are chosen from a collection of most authoritative and best reference books on Physics. Our aim is to prepare an individual for competitive exams like NTS, GAT, ECAT, MDCAT, Teaching jobs Tests and Chemical industry job interviews. One should practice our Mcqs to assimilate knowledge on Electromagnetism in Physics comprehensively.

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1.
A current carrying conductor is placed in a uniform magnetic field parallel to it. The magnetic force experienced by the conductor is

F=1/B

F=1/Bsin?

F/0

F=1/Bcos?

2.
A galvanometer basically is an instrument used to

Detect current in a circuit

Measure current flowing through a circuit

Measure voltage across a circuit

Measure potential difference between two points in a circuit

3.
A magnetic compass will be deflected if it is kept near a

Charge in motion

Charge at rest

Both

None

4.
A magnetic field

Always exerts a force on a charged particle

Never exerts a force on a charged particles

Exerts a force if the charged particle is moving in the direction of the magnetic field lines

Exerts a force if the charged particle is moving perpendicular to the magnetic field lines

5.
A moving coil galvanometer of resistance 100? gives half scale deflection for a current of 20mA. What will be the potential difference across it?

4 volt

5 volt

2 volt

0.4 volt

6.
A particle of mass m charge q and speed V enters a uniform magnetic radius r. The radius r of the circle is

Independent mass m

Directly proportional to m

Directly proportional to q

Directly proportional to B

7.
A sensitive galvanometer gives full-scale deflection with 100 mV. If the resistance of the galvanometer is 50? the maximum current that can flow through safely is

2.0 mA

20 mA

200 mA

0.2 mA

8.
A wheat stone bridge is said to be balanced when

Maximum current flows through the galvanometer branch

Minimum current flows through the galvanometer branch

Potential difference across galvanometer branch is maximum

Potential difference across galvanometer branch is zero

9.
An ammeter measures the total current flowing through a circuit when it is connected

In series with the circuit

In parallel with circuit

In series with any of the parallel resistances in the circuit

In parallel with any of the series resistances in the circuit

10.
An electron enters a region where the electric field E is perpendicular to the magnetic field B. It will suffer no deflection if

E = BeV

B = eE/V

E = BV

E = BeV/2

11.
An instrument which can measure potential without drawing any current is

Voltmeter

Galvanometer

Cathode ray oscilloscope (CRO)

Ammeter

12.
Coil of a galvanometer is suspended in a radial magnetic field so that the deflecting torque on the coil is always

BINA cosa

BINA sina

BINA tana

BINA

13.
Galvanometer is a very sensitive device with

Very low damping

Very high damping

No damping at all

Radial field disintegration

15.
If a current carrying solenoid is suspended freely it will

Be rotating

Come to rest in N-S direction

Vibrating like galvanometer needle

Comes to rest after rotation

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