ECAT Pre General Science Physics Chapter 12 MCQ Test With Answer

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

Try The 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

One joule is equal to

Question # 2

The fractional change in resistance per kelvin is known as

Question # 3

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

Question # 4

In a building, there are 15 bulbs of 40 watts, 5 bulbs of 100 watts, 5 fans of 80 watts and a heater of 1 kilowatt. The voltage of the electric main is 220 volts. The minimum efficiency of the main fuse of the building will be

Question # 5

The energy stored in a charge capacitor

Question # 6

Heating effect caused by an electric circuit is written

Question # 7

The electric field due to an infinite long thin wire at a distance R varies as

Question # 8

The value of electrical constant of proportionality k is

Question # 9

The SI unit of current is

Question # 10

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

Question # 11

Physicist George Simon ohm was a

Question # 12

If we plot graph between potential difference (V) and current (I) obeying ohm's law, it will give us

Question # 13

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

Question # 14

The electric lines of force are

Question # 15

In RC series circuit the time during which the capacitor acquires 0.63 times the equilibrium charge is called

Question # 16

The electric flux from a closed surface

Question # 17

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

Question # 18

For two resistance wires joined in parallel, the resultant resistance is 6/5 ohm. When one of the resistance wire breaks, the effective resistance becomes 2 ohm. The resistance of the broken wire is

Question # 19

A ten ohm electric heater operates on a 110 V line. Calculate the rate at which it develops heat in watts

Question # 20

If a 40 watt light bulb burns for 2 hours. how much heat is generated

Question # 21

The unit of resistance is

Question # 22

Surface density of charge is defined as

Question # 23

The force of repulsion between two point charges is F, when these are at a distance 0.1 m apart. Now the point charges are replaced by sphere of radii 5 cm each having the same charge as that of the respective point charges. The distance between their centre is again kept 0.1 m ; then the force of repulsion will

Question # 24

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

Question # 25

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

Question # 26

Capacitance of two or more capacitors

Question # 27

Ohm is the unit of

Question # 28

The SI unit of capacitance is

Question # 29

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

Question # 30

If we increase the distance between two plates of the capacitor, the capacitance will

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 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
2 A condenser of capacity 50μF is charged to 10 V.The energy stored is
A. 1.25 x 10-3J
B. 3.75 x 10-3J
C. 2.5 x 10-3J
D. 5 x 10-3J
3 The SI unit of permitivity is
A. Nm2C2
B. N-1m-2C2
C. NmC2
D. Nm2C-1
4 The potential difference across each resistance in series combination is
A. same
B. different
C. zero
D. none of these
5 The dot product of electric field intensity E and vector area A is called
A. Electric potential
B. Electric flux
C. Electric field
D. Magnetic field
6 The fractional change in resistance per kelvin is known as
A. temperature coefficient
B. resistance coefficient
C. super temperature
D. critical temperature
7 Two point charge +3μC and +8μC repel each other with a force of 40 N. If a charge of -5μC is added to each of them, then the force between then will become
A. -10 N
B. +10 N
C. +20 N
D. -20 N
8 The thermistors are usually made of
A. Metals with low temperature coefficient of resistivity
B. Metals with high temperature coefficient of resistivity
C. Metal oxides with high temperature coefficient of resistivity
D. Semi conducting materials having low temperature coefficient of resistivity
9 If 2.2 kilowatt power is transmitted through a 10 ohm line at 22000 volt, the power loss in the form of heat will be
A. 0.1 watt
B. 1 watt
C. 10 watt
D. 100 watt
10 The relation between charge 'Q' and current 'I' is given by
A. Q = I/t
B. Q = It
C. Q = I2t
D. Q = I2/t

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