ECAT Pre Computer Science Chapter 14 MCQ Test With Answer

MCQ's Test For ECAT Physics Chapter 14 Electromagnetism

Try The MCQ's Test For ECAT Physics Chapter 14 Electromagnetism

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ECAT Physics Chapter 14 Electromagnetism

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Question # 1

The force acting as one meter length of the conductor placed at right angle to the magnetic field, when one A current is passing through it, defines the

Question # 2

The e/m of an electron moving in a circular path in a magnetic field is equal to

Question # 3

The voltage increases linearly with

Question # 4

The sources of magnetic field are

Question # 5

Centripetal force for electron is given by

Question # 6

The magnetic force exerted on an electron moving with velocity 'v' at right angle to the magnetic field is given by

Question # 7

Magnetic induction is also called as:

Question # 8

The CRO is used for displaying the waveform of a given

Question # 9

If the number of turns of a solenoid (carrying a steady current I) is doubled without changing the length of a solenoid, then magnetic field:

Question # 10

(CRO) Cathode ray oscilloscope is a device used for high speed

Question # 11

The pointer of a magnetic compass:

Question # 12

if the field is directed along the normal to the area, then flux is:

Question # 13

A solenoid is a coil of wire which is:

Question # 14

Charge to mass ratio (e/m) of an electron is given by the relation

Question # 15

When an electron enters in a magnetic field right angle to its motion, the magnitude of its velocity will be

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ECAT Physics Chapter 14 Important MCQ's

Sr.# Question Answer
1 At a given instant, a photon moves in +x direction in a region where there magnetic field in -z direction. The magnetic force on the proton will be the:
A. -y direction
B. +y direction
C. +z direction
D. -z direction
2 When some compass needles are placed on a card board along a circle with the center at the wire, they will
A.

Point the direction of N-S

B.

Set themselves tangential to the circle

C.

Point in the direction of E-W

D.

None of these
3 A full-scale deflection is obtained in a galvanometer with a current of few
A. ampere
B. volts
C. milliampere
D. ohm
4

The pointer of a magnetic compass:
A.

Is affected only by permanent magnets

B.

Align itself parallel to the applied magnetic field

C.

Vibrates in the magnetic field of the current

D.

Aligns itself perpendicular to the magnetic field
5 Lorentz force is defined as
A. q(E + V x B)
B. q(E x B + V)
C. q(E x V + B)
D. q(E x B)
6 The working of all DC electric meters (galvanometers, ammetersand voltmeters) depends upon
A. Heating effect of current
B. Chemical effect of current
C. Magnetic effect of current
D. Electromagnetic effect of current
7 If the number of turns of a solenoid (carrying a steady current I) is doubled without changing the length of a solenoid, then magnetic field:
A. Becomes Half
B. Becomes double
C. Is not affected
D. Becomes one fourth
8 A galvanometer is an instrument used to
A. measure voltage across a circuit
B. detect current in a circuit
C. measure current flowing through a circuit
D. none of these
9 The current sensitivity of the galvanometer is
A. C/BAN
B. BAN/C
C. CAN/B
D. CBN/A
10 magnetic field is a:
A.

Vector quantity

B.

Scalar quantity

C.

Scalar as well as scalar quantity

D.

Any of (A) or (B)

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