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 excess (equal in number) of electrons that must be placed on each of two small spheres spaced 3 cm apart, with force of repulsion between the spheres to be 10-19N, is

Question # 2

The powers of tow electric bulbs are 100 W and 200 W. Both of them are joined with 220 V mains. The ratio of resistances of their filaments will be

Question # 3

The resistivity of a substance depends upon the

Question # 4

The electric intensity outside the two oppositely charged parallel metal plates is

Question # 5

The SI unit of permitivity is

Question # 6

If the distance of separation between two chares is increased, the electrical potential energy of the system will

Question # 7

The electric field intensity at a point due to a point charge

Question # 8

The SI unit of capacitance is

Question # 9

A proton is about 1840 times heavier than an electron. When it is accelerated by a potential difference of 1 KV, its kinetic energy will be

Question # 10

Capacitance of two or more capacitors

Question # 11

The current through a metallic conductor is due to the motion of

Question # 12

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

Question # 13

106electrons are moving through a wire per second, the current developed is

Question # 14

One coulomb of charge is created by

Question # 15

Some charge is being given to a conductor. Then its potential

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 If we increase the distance between two plates of the capacitor, the capacitance will
A. Increase
B. Decrease
C. Remain same
D. First increase then decrease
2 At ordinary temperature, an increase in temperature increases the conductivity of
A. Conductor
B. Semiconductor
C. Insulator
D. Alloy
3 The unit of intensity of electric field is
A. newton/coluomb
B. jule/coluomb
C. volt x metre
D. newton/metre
4 A heater coil rated at (1000 W - 200 V) is connected to 110 volt line. What will be the power consumed?
A. 200 W
B. 302.5
C. 250 W
D. 350 W
5 The charge carriers in gases are
A. electrons
B. ions
C. protons
D. ions and electrons
6 A charge Q is divided into two parts q and Q - q and separated by a distance R. The force of repulsion between them will be maximum when
A. q = Q/4
B. q = Q/2
C. q = !
D. None of these
7 The resistance of an incandescent lamp is
A. Smaller when switched on
B. Greater when switched off
C. The same whether it is switch off or switch on
D. Greater when switched on
8 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
A. Zero
B. 10Ω
C. 1Ω
D. 0.10Ω
9 The electric lines of force are
A. Imaginary
B. Physically existing everywhere
C. Physically existing near the charge
D. All of the above
10 Free electrons are
A. tightly bound
B. fixed
C. loosely bound
D. tightly fixed

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