ECAT Pre Engineering Physics Chapter 12 MCQ Test With Answer

MCQ's Test For Physics ECAT Pre Engineering Chapter 12 Electrostatics

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

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Physics ECAT Pre Engineering Chapter 12 Electrostatics

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Question # 1

Ohm's law states that

Question # 2

Current provided by a battery is maximum when

Question # 3

In case of a parallel plate capacitor if the plate separation is doubled and plate area is halved, the capacitance becomes

Question # 4

A point charge Q is placed at the mid-point of a line joining two charges. 4q and q. if the net force on charge q is zero. then Q must be equal to

Question # 5

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

Question # 6

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

Question # 7

If two bulbs one of 60 W and other of 100 W are connected in parallel, then which one of the following will flow more?

Question # 8

Battery is charged in motor cars, which is based on

Question # 9

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

Question # 10

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

Question # 11

The liquid which conduct current is known as

Question # 12

The resistance of the given conductor can be increased by

Question # 13

The electric field will be uniform

Question # 14

A metal plate of thickness half the separation between the capacitor plates of capacitance C is inserted. The new capacitance is

Question # 15

What is the current is a 2 x 106ohm resistor having a potential difference of 2 x 103volts?

Question # 16

The unit of resistivity is

Question # 17

Which of the following does not obey ohm's law?

Question # 18

Capacitance of two or more capacitors

Question # 19

A sheet of aluminium foil of negligible thickness is introduced between the plates of a capacitor. The capacitance of the capacitor

Question # 20

In a voltmeter the conduction takes place due to

Question # 21

Physicist George Simon ohm was a

Question # 22

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

Question # 23

Thermocouple is an arrangement of two different metals

Question # 24

The unit of resistance is

Question # 25

Potentiometer is more sensitive than voltmeter, because

Question # 26

A certain charge liberates 0.8 g of oxygen. The same charge will liberate. how many g of silver?

Question # 27

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 # 28

Cause of heat production in a current carrying conductor is

Question # 29

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

Question # 30

Electric generators which convert mechanical energy into

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 The nature of capacity of electrostatic capacitor depends on
A. Shape
B. Size
C. Thickness of plates
D. Area
2 The electric potential at the surface of an atomic nucleus (Z = 50) of radius 9.0 x 10-15 is
A. 9 x 105V
B. 9 V
C. 8 x 106V
D. 80 V
3 Which of the following does not obey ohm's law?
A. Copper
B. Al
C. Diode
D. None
4 The energy required to charge a capacitor of 5μF by connecting D.C. source of 20 KV is
A. 10 KJ
B. 5 KJ
C. 2 KJ
D. 1 KJ
5 If two bulbs one of 60 W and other of 100 W are connected in parallel, then which one of the following will flow more?
A. 60 W bulb
B. 100 W bulb
C. Both equally
D. None of these
6 In case of a parallel plate capacitor if the plate separation is doubled and plate area is halved, the capacitance becomes
A. Four-fold
B. One-half
C. One-fourth
D. Zero
7 The electric lines of force are
A. Imaginary
B. Physically existing everywhere
C. Physically existing near the charge
D. All of the above
8 Electric potential of earth is taken to be zero because the earth is good
A. Semiconductor
B. Conductor
C. Insulator
D. Dielectric
9 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
10 A car battery has e.m.f 12 volt and internal resistance 5 x 10-2ohm. If it draws 60 ampere current, the terminal voltage of the battery will be
A. 5 volt
B. 3 volt
C. 15 volt
D. 9 volt

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