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

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

Question # 2

In a moving coil galvanometer, the deflecting couple depends upon

Question # 3

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

Question # 4

A solenoid is a coil of wire which is:

Question # 5

The working of all DC electric meters (galvanometers, ammetersand voltmeters) depends upon

Question # 6

Magnetic lines of force:

Question # 7

When a suitable small resistance is put in parallel with the galvanometer coil, it is converted into

Question # 8

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

Question # 9

A current carrying conductor sets up its own:

Question # 10

Magnetic flux passing through a element whose vector area makes an angle0º with lines of magnetic force is:

Question # 11

The magnetic field outside the solenoid due to current is

Question # 12

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

Question # 13

To convert galvanometer into ammeter we connect

Question # 14

The strength of magnetic field around the current conductor is

Question # 15

The force experienced by a single charge carrier moving with velocity 'v' i magnetic field of strength 'B' is given by

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ECAT Physics Chapter 14 Important MCQ's

Sr.# Question Answer
1 The unit of magnetic flux is
A. Weber-m2
B. Weber-m3
C. Henry
D. Weber
2 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
3 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
4 A galvanometer in which the coil comes to rest quickly after the current passed through it, or the current stopped form flowing through it, is called
A. dead beat galvanometer
B. stable galvanometer
C. shunt galvanometer
D. sensitive galvanomter
5 In a moving coil galvanometer, the deflecting couple depends upon
A. area of the coil
B. number of turns of coil
C. value of magnetic field
D. all of the above
6 The permeability of free space is measured in:
A. Wb/Am
B. Wb A/m
C. Am/Wb
D. m/Web A
7 It is customary represent a current flowing towards the reader by a symbol
A. (x)
B. (+)
C. (.)
D. (-)
8 If the value of galvanometer constant k = C/BAN is made small, the galvanometer can be made
A. Sensitive
B. Accurate
C. Stable
D. None of these
9 The sources of magnetic field are
A. isolated magnetic poles
B. charges at rest
C. charges in motion
D. none of these
10 A long wire wound tightly on a cylindrical core is called:
A. Potentiometer
B. Solenoid
C. Toroid
D. Wheat and stone bridge

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