ECAT Pre General Science Physics Chapter 14 MCQ Test With Answer

MCQ's Test For ECAT Pre General Science Physics Chapter 14 Electromagnetism

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

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ECAT Pre General Science Physics Chapter 14 Electromagnetism

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Question # 1

Electron gun consist of

Question # 2

Magnetic lines of force:

Question # 3

In a straight current carrying conductor, the direction of magnetic field can be found by

Question # 4

The magnetic field in the middle of a solenoid due to current is

Question # 5

The SI unit of magnetic induction is

Question # 6

The galvanometer can be made sensitive if the value of the factor C/BAN is

Question # 7

Total number of turns on 0.15 m length solenoid is 300. the value of n is:

Question # 8

Magnetic induction is also called as:

Question # 9

The unit of magnetic flux is

Question # 10

When current passes through a solenoid coil, it behaves like a

Question # 11

Current is measured in

Question # 12

The straight current carrying conductor experiences maximum force in a uniform magnetic field when it is placed

Question # 13

magnetic field is a:

Question # 14

When the waveform of one voltage is increasing and that of second is decreasing and vice versa, then phase difference between these voltage is

Question # 15

If the value of galvanometer constant k = C/BAN is made small, the galvanometer can be made

Question # 16

The magnetic field outside the solenoid due to current is

Question # 17

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

Question # 18

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

Question # 19

Avo-meter is used of measure the

Question # 20

Magnetic flux passing through the an element of are A placed perpendicular to a uniform magnetic field Bis:

Question # 21

In the formula B= µ̻ nl, the symbol n denotes:

Question # 22

The SI unit of flux density is.

Question # 23

The SI unit of flux density is

Question # 24

'K' is the proportionality constant of force experienced by conductor. What is the value of 'K' in SI units?

Question # 25

The force exerted on a conductor of length L, carrying current I when placed in a magnetic field B is given by

Question # 26

The force experienced by an electron projected in a magnetic field B with a velocity V is given by

Question # 27

A galvanometer is an instrument used to

Question # 28

A current carrying conductor sets up its own:

Question # 29

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 # 30

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

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ECAT Physics Chapter 14 Important MCQ's

Sr.# Question Answer
1 The CRO is used for displaying the waveform of a given
A. current
B. voltage
C. both of them
D. none of them
2 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
3 A full-scale deflection is obtained in a galvanometer with a current of few
A. ampere
B. volts
C. milliampere
D. ohm
4 A shunt resistance parallel to the galvanometer is used to convert it into
A. avometer
B. millimeter
C. voltmeter
D. none of these
5 The unit of flux density is also given by
A. Weber/m2or Wb . m-2
B. Weber/mor Wb . m
C. Weber/mor Wb . m-1
D. Weber or Wb
6 The magnetic field inside a solenoid can be increased by:
A. Increasing n
B. Decreasing I
C. Increasing I
D. By using iron core within solenoid
7 It is customary represent a current flowing towards the reader by a symbol
A. (x)
B. (+)
C. (.)
D. (-)
8 A magnetic force on an electron travelling with 108ms-1parallel to a field of strength 1 Wb m-2is
A. Zero
B. 105 m
C. 10-10N
D. 108N
9 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
A. magnetic flux
B. magnetic induction
C. magnetic field
D. self inductance
10 A voltmeter is used to measure the
A. potential difference
B. current
C. temperature
D. resistance

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