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

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 # 2

When a dielectric material is introduced between the plates of a charged condenser the electric field between the plates

Question # 3

The material in the form of wire or rod or plate which leads the current into or cut of the electrolyte is known as

Question # 4

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 # 5

An electric charge at rest is

Question # 6

The minimum charge on any object can not be less than

Question # 7

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

Question # 8

Physicist George Simon ohm was a

Question # 9

If one volt is needed to cause a current of one ampere to flow in a conductor, its resistance is

Question # 10

Resistance of a conductor depends upon

Question # 11

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 # 12

The potential difference across the conductors should be maintained constant by connecting the ends of wire to the terminal of a device called a source of

Question # 13

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 # 14

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

Question # 15

Electric generators which convert mechanical energy into

Question # 16

Resistance of a conductor is increased, the currant will

Question # 17

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

Question # 18

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

Question # 19

Solar cell converts sunlight directly into

Question # 20

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

Question # 21

The electrode connected with the positive terminal of the current source is called

Question # 22

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

Question # 23

In a voltmeter the conduction takes place due to

Question # 24

Free electrons are

Question # 25

Potentiometer is more sensitive than voltmeter, because

Question # 26

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 # 27

The earth's potential is taken as

Question # 28

The electric field will be uniform

Question # 29

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

Question # 30

The ratio of the gravitational force Fgto the electrostatic force Febetween two electrons at the same distance apart is approximately

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 One coulomb of charge is created by
A. 10 electrons
B. 1.6 x 10-19electrons
C. 6.25 x 1018electrons
D. 6.25 x 1021electrons
2 If the distance between the plates of a parallel plate condenser of capacity 10μF is doubled then new capacity will be
A. 5μF
B. 20μF
C. 10μF
D. 15μF
3 Physicist George Simon ohm was a
A. German physical
B. French physicist
C. Chinese physicist
D. Russian physicist
4 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
5
Question Image
A. 5μF
B. 10μF
C. 3μF
D. 6μF
6 Electron volt is the unit of
A. Potential difference
B. Energy
C. Resistance
D. Capacitance
7 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
8 Resistance of a conductor is increased, the currant will
A. Decrease
B. Increase
C. Remain the same
D. None of these
9 In a charged capacitor the energy is stored in
A. Both in positive and negative charges
B. Positive charges
C. The edges of the capacitor plates
D. The electric field between the plates
10 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

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