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

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

Question # 2

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

Question # 3

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 # 4

In the region surrounding a current carrying wire:

Question # 5

The magnetic field outside the solenoid due to current is

Question # 6

If volume of wire is 'AL' and there are 'n' numbers of charge carriers per unit volume, then the total number of charge carriers are

Question # 7

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

Question # 8

The direction of lines of force depends upon the direction of

Question # 9

When charged particle is projected perpendicular to a uniform magnetic field its trajectory is

Question # 10

Centripetal force for electron is given by

Question # 11

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

Question # 12

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

Question # 13

Magnetic lines of force:

Question # 14

How many number of anodes used in electron gun

Question # 15

Lorentz force is defined as

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ECAT Physics Chapter 14 Important MCQ's

Sr.# Question Answer
1 For the conversion of galvanometer into voltmeter, we connect a
A. small resistance in series with galvanometer
B. small resistance in parallel with galvanometer
C. high resistance in parallel with galvanometer
D. high resistance series with galvanometer
2 Flurescent screen is a screen where visible spot
A. vanishes
B. is made
C. becomes small and large
D. none of these
3 A solenoid is a coil of wire which is:
A.

Short, loosely wound, cylindrical

B.

Long, tightly wound, spherical

C.

Long, loosely wound, cylindrical

D.

Long, tightly wound, cylindrical
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 The voltage increases linearly with
A. time
B. velocity
C. acceleration
D. torque
6 If volume of wire is 'AL' and there are 'n' numbers of charge carriers per unit volume, then the total number of charge carriers are
A. n/AL
B. Al/n
C. nAL
D. nA/L
7 Total number of turns on 0.15 m length solenoid is 300. the value of n is:
A. Greater than 300
B. Smaller than 300
C. Equal to 300
D. Any of (A) or (B)
8 A full-scale deflection is obtained in a galvanometer with a current of few
A. ampere
B. volts
C. milliampere
D. ohm
9 Which one of the following relations is correct?
A. 1 Wb-m2= Nm-1A-1
B. 1 tesla = 104 gausses
C. 1 Wb-m2= 1 tesla
D. All of the above
10 Tesla is the unit of
A. Magnetic induction or flux density
B. Magnetic flux
C. Self inductance
D. None of these

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