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

NmA-1 is commonly called:

Question # 2

magnetic field is a:

Question # 3

A long wire wound tightly on a cylindrical core is called:

Question # 4

The magnetic field outside the solenoid due to current is

Question # 5

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

Question # 6

Electron gun consist of

Question # 7

To convert galvanometer into ammeter we connect

Question # 8

Current is measured in

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

The torque per unit twist of coil is called

Question # 11

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

Question # 12

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

Question # 13

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

Question # 14

The pointer of a magnetic compass:

Question # 15

The angle of deflection of coil can be measured by the

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ECAT Physics Chapter 14 Important MCQ's

Sr.# Question Answer
1 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
2 A charged particle moving at right angle to the magnetic field will experience
A. minimum force
B. maximum force
C. zero
D. moderate force
3 F = I(L x B) is a
A. vector
B. scalar
C. unit vector
D. none of these
4 The current in microamperes required to produce one millimeter deflection on a scale placed one meter away from the mirror of the galvanometer, defined the sensitivity of
A. ammeter
B. voltmeter
C. galvanometer
D. avo-meter
5 A beam of electrons is provided by an
A. electron gun
B. Suppray
C. Injection
D. None of these
6 The gavanometer constant of a moving coil galvanometer is given by
A. K=BAN/C
B. K=BN/CA
C. K=NAC/B
D. K=C/BAN
7 A relationship between Gauses of magnetic induction and Tesla(T) is given by
A. G 10-3T
B. G = 10-2T
C. G = 10-4T
D. G = 10-1T
8 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
9 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
10 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

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