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

An alpha particle is accelerated through a potential difference of 106volt. Its kinetic energy will be

Question # 2

The ohm's is defined as

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

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 # 5

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

Question # 6

The value of electrical constant of proportionality k is

Question # 7

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

Question # 8

A piece of fuse wire melts when a current of 15 ampere flows through it. With this current. If it dissipates 22.5 W, the resistance of fuse wire will be

Question # 9

The current through a metallic conductor is due to the motion of

Question # 10

The relation between charge 'Q' and current 'I' is given by

Question # 11

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

Question # 12

One moving a charge of 20 coulombs by 2 cm, 2 J of work is done, then the potential difference between the points is

Question # 13

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

Question # 14

The resistance of a conductor does not depend on its

Question # 15

106electrons are moving through a wire per second, the current developed is

Question # 16

Electron volt is the unit of

Question # 17

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

Question # 18

A medium of dielectric constant 'K' is introduced between the plates of parallel plate condenser. As a result its capcitance

Question # 19

The liquid which conduct current is known as

Question # 20

The thermistors are usually made of

Question # 21

A 10 F capacitor is charged to a potential difference of 50 V and is connected to another uncharged capacitor in parallel. Now the common potential difference becomes 20 volt.The capacitance of second capacitor is

Question # 22

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

Question # 23

Which one of the following is the unit of electric field intensity

Question # 24

Electric flux is defined by the relation

Question # 25

In a voltmeter the conduction takes place due to

Question # 26

The minimum charge on any object can not be less than

Question # 27

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

Question # 28

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 # 29

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

Question # 30

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

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 The SI unit of current is
A. watt
B. coulomb
C. volt
D. ampere
2 The substances whose resistance decreases with the increase in temperature these substances have coefficient of
A. positive temperature
B. negative temperature
C. absolute temperature
D. zero temperature
3 A wire of radius r has resistance R. If it is stretched to a wire of r/2 radius, then the resistance becomes
A. 2R
B. 4R
C. 16R
D. Zero
4 The potential difference across each resistance in series combination is
A. same
B. different
C. zero
D. none of these
5 Which of the following does not obey ohm's law?
A. Copper
B. Al
C. Diode
D. None
6 Force acting upon a charged particle kept between the plates of a charged condenser if F. IF one of the plates of the condenser is removed, force acting on the same will become
A. Zero
B. F/2
C. F
D. 2F
7 The conductivity of a superconductor is
A. Infinite
B. Very large
C. Very small
D. Zero
8 The capacitance of a parallel plate capacitor depends upon
A. Area of the plates
B. Separation between the plates
C. Medium between the plates
D. All of the above
9 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
A. They have the same potential
B. They have the same amount of charge
C. They have the same capacity
D. They have the same shape
10 At ordinary temperature, an increase in temperature increases the conductivity of
A. Conductor
B. Semiconductor
C. Insulator
D. Alloy

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