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 dot product of electric field intensity E and vector area A is called

Question # 2

The concept of field theory was put forward by

Question # 3

If 2.2 kilowatt power is transmitted through 1 10 ohm line at 22000 volt, the power loss in the form of heat will be

Question # 4

The ohm's is defined as

Question # 5

The electric potential at the surface of an atomic nucleus (Z = 50) of radius 9.0 x 10-15 is

Question # 6

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

Question # 7

The charge carriers in electrolyte are positive and negative

Question # 8

Two point charges A and B separated by a distance R attract each other with a force of 12 x 10-3N. The force between A and B when the charges on them are doubled and distance is halved

Question # 9

The resistance of a conductor does not depend on its

Question # 10

Physicist George Simon ohm was a

Question # 11

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 # 12

The electric flux is linked with a surface will be maximum when

Question # 13

Resistor is a device which convert electric energy to

Question # 14

Electric potential of earth is taken to be zero because the earth is good

Question # 15

The electric field will be uniform

Question # 16

The earth's potential is taken as

Question # 17

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 # 18

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

Question # 19

One joule is equal to

Question # 20

Current provided by a battery is maximum when

Question # 21

An electric charge at rest is

Question # 22

Electron volt is the unit of

Question # 23

One electron volt is equal to

Question # 24

The SI unit of capacitance is

Question # 25

Capacitance of two or more capacitors

Question # 26

Coulomb force, when any material medium is placed between two charges

Question # 27

Ohm established a relation between

Question # 28

A capacitor of capacity 1μF is charged to 1 KV. The energy stored in J

Question # 29

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

Question # 30

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

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 Potentiometer is more sensitive than voltmeter, because
A. Voltmeter has a very high resistance
B. Voltmeter has a very low resistance
C. Potentiometer does not draw any current from a source of unknown potential difference
D. Potentiometer is sensitive
2 A ten ohm electric heater operates on a 110 V line. Calculate the rate at which it develops heat in watts
A. 1310 W
B. 670 W
C. 810 W
D. 1210 W
3 In bringing an electron towards another electron, electrostatic potential energy of system
A. Decreases
B. Increases
C. Remains uncharged
D. Becomes zero
4 A charge of 0.1 c accelerated through a potential difference of 1000V acquires kinetic energy
A. 200 J
B. 100 J
C. 1000 J
D. 400 J
5 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
6 Electric generators which convert mechanical energy into
A. solar energy
B. thermal energy
C. kinetic energy
D. electrical energy
7 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
8 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
9 Two electric bulbs of 200 W and 100 W have same voltage. If R1and R2be their resistance respectively then
A. R1= 2R2
B. R2= 2R1
C. R2 = 4R1
D. R1= 4R2
10 A cube of metal is given a positive charge Q. For the above system, which of the following statements is true?
A. Electric potential at the surface of the cube is zero
B. Electric potential within the cube is zero
C. Electric filed is normal to the surface of the cube
D. Electric filed varies within the cube

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