ECAT Pre General Science Physics Chapter 12 MCQ Test With Answer

MCQ's Test For ECAT Pre General Science Physics Chapter 12 Electrostatics

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ECAT Pre General Science Physics Chapter 12 Electrostatics

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Question # 1

The substances whose resistance decreases with the increase in temperature these substances have coefficient of

Question # 2

The ohm's is defined as

Question # 3

The electric flux from a closed surface

Question # 4

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

Question # 5

Electron volt is the unit of.

Question # 6

The energy required to charge a capacitor of 5μF by connecting D.C. source of 20 KV is

Question # 7

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

Question # 8

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 # 9

Three resistors of resistance 2,3 and 6 ohms are connected in parallel, their equivalent resistance is

Question # 10

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

Question # 11

The electric field will be uniform

Question # 12

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

Question # 13

Current provided by a battery is maximum when

Question # 14

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 # 15

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

Question # 16

The earth's potential is taken as

Question # 17

The capacitance of a parallel plate capacitor depends upon

Question # 18

An electric charge at rest is

Question # 19

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 # 20

Heating effect caused by an electric circuit is written

Question # 21

If the length of the conductor is double and its cross sectional area is halved, its conductance will

Question # 22

Resistor is a device which convert electric energy to

Question # 23

One coulomb of charge is created by

Question # 24

Solar cell converts sunlight directly into

Question # 25

Which of the following represents an electric current?

Question # 26

A conducting wire is drawn to double its length. Final resistivity of the material will be

Question # 27

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

Question # 28

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 # 29

The charge carriers in electrolyte are positive and negative

Question # 30

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

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 A heater coil rated at (1000 W - 200 V) is connected to 110 volt line. What will be the power consumed?
A. 200 W
B. 302.5
C. 250 W
D. 350 W
2 The electric field intensity at a point due to a point charge
A. Falls off inversely as the distance
B. Falls off inversely as the square of distance
C. Remains unchanged with distance
D. Increase directly as square of distance
3 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
4 The electric lines of force are
A. Imaginary
B. Physically existing everywhere
C. Physically existing near the charge
D. All of the above
5 When an electron is accelerated through a P.D. of an one volt, it will acquire energy equal to
A. One joule
B. One erg
C. One electron volt
D. None of these
6 The minimum charge on any object can not be less than
A. 1.6 x 10-19C
B. 3.2 x 10-19C
C. 1.0 C
D. 4.8 x 10-19C
7 The unit of resistance is
A. volt
B. ampere
C. ohm
D. coat
8 Which one of the following has larger value of relative permitivity Erat room temperature?
A. Vaccum
B. Air
C. Glass
D. Water
9 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
10 If the two charges in Coulomb's law have double distance between them, then electric force
A. Becomes two-fold
B. Becomes four-fold
C. Remains the same
D. None of these

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