ECAT Pre General Science Physics Chapter 12 MCQ Test With Answer

MCQ's Test For ECAT Pre General Science Physics Chapter 12 Electrostatics

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ECAT Pre General Science Physics Chapter 12 Electrostatics

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Question # 1

The charge per unit time through any cross-section of a conductor is called

Question # 2

If the length of the conductor is double and its cross sectional area is halved, its conductance will

Question # 3

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

Question # 4

The fractional change in resistance per kelvin is known as

Question # 5

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 # 6

A one microfarad capacitor of a TV is subjected to 4000 V potential difference. The energy stored in capacitor is

Question # 7

A condenser of capacity 50μF is charged to 10 V.The energy stored is

Question # 8

The colour sequence in a carbon resistor in red, brown, orange and silver. The resistance of the resistor is

Question # 9

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

Question # 10

The SI unit of capacitance is

Question # 11

The resistance of a conductor does not depend on its

Question # 12

Three resistance 500,500 and 50 ohms are connected in series across 555 volts mains. The current flowing through them will be

Question # 13

Capacitance of two or more capacitors

Question # 14

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

Question # 15

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

Question # 16

A 60 W bulb operates on 220 V supply. The current flowing through the bulb is

Question # 17

The unit of resistance is

Question # 18

Electron volt is the unit of.

Question # 19

If an electron of charge 'e' is accelerated through a potential difference V., it will acquire energy

Question # 20

The energy required to charge a capacitor of 5μF by connecting D.C. source of 20 KV is

Question # 21

Which one of the following has larger value of relative permitivity Erat room temperature?

Question # 22

The potential difference across the conductors should be maintained constant by connecting the ends of wire to the terminal of a device called a source of

Question # 23

In bringing an electron towards another electron, electrostatic potential energy of system

Question # 24

If the resistance of 2 ohm and 4 ohm are connected in parallel, the equivalent resistance will be

Question # 25

The SI unit of conductivity is

Question # 26

The SI unit of electric flux is

Question # 27

The ratio of the gravitational force Fgto the electrostatic force Febetween two electrons at the same distance apart is approximately

Question # 28

The value of electrical constant of proportionality k is

Question # 29

The electric intensity at infinite distance from the point charge will be

Question # 30

The substances whose resistance decreases with the increase in temperature these substances have coefficient of

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 The unit of intensity of electric field is
A. newton/coluomb
B. jule/coluomb
C. volt x metre
D. newton/metre
2 The unit of resistance is
A. volt
B. ampere
C. ohm
D. coat
3 The electric lines of force are
A. Imaginary
B. Physically existing everywhere
C. Physically existing near the charge
D. All of the above
4 Which of the following does not obey ohm's law?
A. Copper
B. Al
C. Diode
D. None
5 Ohm's law states that
A. The current through a resistor is directly proportional to the applied voltage
B. The voltage across a resistor is directly proportional to the current passing through it
C. Resistance is the constant of proportionality between the voltage and current
D. all of these
6 The electric field will be uniform
A. Near a positive point charge
B. Near a negative point charge
C. Between two oppositely charged parallel metal plates
D. None of above
7 In RC series circuit the time during which the capacitor acquires 0.63 times the equilibrium charge is called
A. Time constant
B. Decay constant
C. None of these
D. All of above
8 Ohm is the unit of
A. current
B. capacitance
C. energy
D. resistance
9 Physicist George Simon ohm was a
A. German physical
B. French physicist
C. Chinese physicist
D. Russian physicist
10 A current of 1.6 A is passed through a solution of CuSO4. How many Cu2+ions are liberated in one minute?
A. 3 x 1020
B. 3 x 1010
C. 6 x 1020
D. 6 x 1010

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