ECAT Pre Computer Science Chapter 12 MCQ Test With Answer

MCQ's Test For ECAT Physics Chapter 12 Electrostatics

Try The MCQ's Test For ECAT Physics Chapter 12 Electrostatics

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ECAT Physics Chapter 12 Electrostatics

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Question # 1

The electric potential at the surface of an atomic nucleus (Z = 50) of radius 9.0 x 10-15 is

Question # 2

A heater coil rated at (1000 W - 200 V) is connected to 110 volt line. What will be the power consumed?

Question # 3

Taking the earth to be a spherical conductor of diameter 12.8 x 103km. Its capacity will be

Question # 4

The graphical representation of ohm's law is

Question # 5

A 100 W, 200 V bulb is connected to a 160 volts supply. The actual power consumption would be

Question # 6

If the two charges in Coulomb's law have double distance between them, then electric force

Question # 7

A piece of fuse wire melts when a current of 15 ampere flows through it. With this current. If it dissipates 22.5 W, the resistance of fuse wire will be

Question # 8

Consider a spherical shell of metal at he centre of which a positive point charge is kept

Question # 9

The resistivity of a substance depends upon the

Question # 10

The minimum resistance that can be obtained by connecting 5 resistance of 1/4Ωeach is

Question # 11

The SI unit of capacitance is

Question # 12

When an electron is accelerated through a P.D. of an one volt, it will acquire energy equal to

Question # 13

The conventional current in a circuit is defined as " current which passes from a point at higher potential to a point at lower potential as if it represent a movement of

Question # 14

An electron of charge e coulomb passes through a potential difference of V volts its energy in joules will be

Question # 15

Cause of heat production in a current carrying conductor is

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 Taking the earth to be a spherical conductor of diameter 12.8 x 103km. Its capacity will be
A. 711μF
B. 611μF
C. 811μF
D. 511μF
2 One electron volt is equal to
A. 1.6 x 1019eV
B. 6.25 x 1018 eV
C. 1.6 x 1018 eV
D. 6.25 x 1019eV
3 The resistance of 20 cm long wire is 10Ω. When the length is changed to 40 cm. The new resistance is
A. 10Ω
B. 20Ω
C. 30Ω
D. 40Ω
4 Which of the following represents an electric current?
A. C-1
B. CS-1
C. J.S-1
D. dynes-1
5 A closed surface contains two equal and opposite charges. The net electric flux from the surface will be
A. Negative
B. Positive
C. Infinite
D. Zero
6 The nature of capacity of electrostatic capacitor depends on
A. Shape
B. Size
C. Thickness of plates
D. Area
7 The minimum resistance that can be obtained by connecting 5 resistance of 1/4Ωeach is
A. 4/5Ω
B. 5/4Ω
C. 20Ω
D. 0.05 Ω
8 The statement "the electric force of repulsion or attraction between two point charges is directly proportional to the product of the charges and inversely proportional to square of the distance between them" refer to
A. Coulomb's law
B. Gauss's law
C. Biot-Sarwat law
D. Ampere's law
9 Calculate the amount of charge flowing in 2 minutes in a wire of resistance 10Ωwhen a potential difference of 20 V is applied between its ends
A. 120 C
B. 240 C
C. 20 C
D. 4 C
10 A uniform resistance wire of Length L and diameter d has a resistance R. Another wire of same material has length, 4L and diameter 2d, the resistance will be
A. 2 R
B. R
C. R/2
D. R/4

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