ECAT Pre General Science Physics Chapter 12 MCQ Test With Answer

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

Try The 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

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

Question # 2

Physicist George Simon ohm was a

Question # 3

Current provided by a battery is maximum when

Question # 4

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

Question # 5

Three resistance 500,500 and 50 ohms are connected in series across 555 volts mains. The current flowing through them will be

Question # 6

The thermistors are usually made of

Question # 7

Free electrons are

Question # 8

The electric field will be uniform

Question # 9

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

Question # 10

Heating effect caused by an electric circuit is written

Question # 11

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

Question # 12

Consider a spherical shell of metal at he centre of which a positive point charge is kept

Question # 13

The resistance of 20 cm long wire is 10Ω. When the length is changed to 40 cm. The new resistance is

Question # 14

If an electron of charge 'e' is accelerated through a potential difference V., it will acquire energy

Question # 15

The speed of randomly moving electrons depends upon

Question # 16

Electric flux is defined by the relation

Question # 17

In RC series circuit the time during which the capacitor acquires 0.63 times the equilibrium charge is called

Question # 18

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

Question # 19

The capacity of a parallel plat capacitor depends on the

Question # 20

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 # 21

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

Question # 22

Which of the following does not obey ohm's law?

Question # 23

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 # 24

Electron volt is the unit of.

Question # 25

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

Question # 26

The electric flux from a closed surface

Question # 27

The concept of field theory was put forward by

Question # 28

The capacitance of a parallel plate capacitor depends upon

Question # 29

An electric dipole is at the centre of a hollow sphere of radius r. The total normal electric flux through the sphere is (here Q is the charge and d is the distance between the two charges of the dipole)

Question # 30

The value of electrical constant of proportionality k is

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 A sheet of aluminium foil of negligible thickness is introduced between the plates of a capacitor. The capacitance of the capacitor
A. Increases
B. Decreases
C. Remain unchanged
D. Becomes infinite
2 Which of the following does not obey ohm's law?
A. Copper
B. Al
C. Diode
D. None
3 Free electrons are
A. tightly bound
B. fixed
C. loosely bound
D. tightly fixed
4 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
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 If an electron of charge 'e' is accelerated through a potential difference V., it will acquire energy
A. Ve
B. V/e
C. e/V
D. 2Ve
7 An alpha particle is accelerated through a potential difference of 106volt. Its kinetic energy will be
A. 1 MeV
B. 2 MeV
C. 4 MeV
D. 8 MeV
8 The electric field due to an infinite long thin wire at a distance R varies as
A. 1/R
B. 1/R2
C. R
D. R2
9 An electric dipole is at the centre of a hollow sphere of radius r. The total normal electric flux through the sphere is (here Q is the charge and d is the distance between the two charges of the dipole)
A. Q/4πr2
B. 2Q/4πr2
C. Q.d
D. Zero
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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