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

The SI unit of electric field intensity is

Question # 2

The conductivity of a superconductor is

Question # 3

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

Question # 4

Magnetic effect at a point caused due to flow a current depend upon the

Question # 5

The resistance of an incandescent lamp is

Question # 6

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

Question # 7

The concept of field theory was put forward by

Question # 8

The SI unit of electric flux is

Question # 9

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

Question # 10

In a Milikian's oil drop experiment the charge on an oil drop is calculated to be 6.35 x 10-19C. The number of excess electrons on the drop is

Question # 11

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

Question # 12

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

Question # 13

The SI unit of conductivity is

Question # 14

An electric charge at rest is

Question # 15

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

Question # 16

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 # 17

The relation V = IR represents

Question # 18

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

Question # 19

Two conductors having the same type of charges are connected by a conducting wire. There would not be any amount of charges on them if

Question # 20

Three resistors of resistance R each are combined in various ways. Which of the following cannot be obtained?

Question # 21

A 50 volt battery is connected across 10 ohm resistor. The current is 4.5 A. The internal resistance of the battery is

Question # 22

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

Question # 23

Ohm is the unit of

Question # 24

The SI unit of current is

Question # 25

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

Question # 26

One coulomb of charge is created by

Question # 27

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

Question # 28

A wire is bent into a ring of radius R is given a charge q. The magnitude of the electrical field at the centre of the ring is

Question # 29

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

Question # 30

A hollow insulated conduction sphere is given a positive charge of 10μC. What will be the electric field at the centre of the sphere if its radius is 2 meters?

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 A hollow insulated conduction sphere is given a positive charge of 10μC. What will be the electric field at the centre of the sphere if its radius is 2 meters?
A. Zero
B. 5μC m-2
C. 20μC m-2
D. 8μC m-2
2 Electric potential of earth is taken to be zero because the earth is good
A. Semiconductor
B. Conductor
C. Insulator
D. Dielectric
3 The unit of resistance is
A. volt
B. ampere
C. ohm
D. coat
4 The unit of resistivity is
A. ohm
B. ohm-m2
C. ohm-meter
D. ohm-m-1
5 Consider a spherical shell of metal at he centre of which a positive point charge is kept
A. The electric filed is zero outside the shell
B. The electric field is zero everywhere
C. The electric field is zero in the region inside the shell
D. The electric field is non-zero in both regions outside and inside the shell
6 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
7 Three resistors of resistance R each are combined in various ways. Which of the following cannot be obtained?
A. 3RΩ
B. 2R/4Ω
C. R/3Ω
D. 2R/3Ω
8 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
9 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
A. 25
B. 225
C. 625
D. 1250
10 A wire is bent into a ring of radius R is given a charge q. The magnitude of the electrical field at the centre of the ring is
A. Two
B. 1/2
C. Zero
D. 3/2

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