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 graphical representation of ohm's law is

Question # 2

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

Question # 3

Solar cell converts sunlight directly into

Question # 4

If we plot graph between potential difference (V) and current (I) obeying ohm's law, it will give us

Question # 5

The value of electrical constant of proportionality k is

Question # 6

Potentiometer is more sensitive than voltmeter, because

Question # 7

One coulomb per second is equal to

Question # 8

The nature of capacity of electrostatic capacitor depends on

Question # 9

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

Question # 10

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 # 11

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

Question # 12

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

Question # 13

An electric charge at rest is

Question # 14

The SI unit of conductivity is

Question # 15

The thermistors are usually made of

Question # 16

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

Question # 17

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

Question # 18

The electric intensity outside the two oppositely charged parallel metal plates is

Question # 19

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

Question # 20

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 # 21

A parallel plate capacitor is first charged and then a dielectric slab is introduced between the plates. The quantity that remains unchanged is

Question # 22

Capacitance of two or more capacitors

Question # 23

The electric flux from a closed surface

Question # 24

The SI unit of capacitance is

Question # 25

The charge carriers in electrolyte are positive and negative

Question # 26

Equal charges are given to two spheres of different radii. The potential will

Question # 27

The SI unit of permitivity is

Question # 28

A hollow insulated conduction sphere is given a positive charge of 10μC. What will be the electric field at the centre of the sphere if its radius is 2 meters?

Question # 29

Cause of heat production in a current carrying conductor is

Question # 30

The relation between the charge Q of a parallel plate capacitor and the P.D between its plates is

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 The charge carriers in electrolyte are positive and negative
A. protons
B. electrons
C. ions
D. none of these
2 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
3 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
A. 3/5 ohm
B. 2 ohm
C. 6/5 ohm
D. 3 ohm
4 The relation between charge 'Q' and current 'I' is given by
A. Q = I/t
B. Q = It
C. Q = I2t
D. Q = I2/t
5 A 100 W, 200 V bulb is connected to a 160 volts supply. The actual power consumption would be
A. 64 W
B. 80 W
C. 100 W
D. 125 W
6 A conducting wire is drawn to double its length. Final resistivity of the material will be
A. Double of the original one
B. Half of the original one
C. One fourth of the original one
D. Same as original one
7 A hollow insulated conduction sphere is given a positive charge of 10μC. What will be the electric field at the centre of the sphere if its radius is 2 meters?
A. Zero
B. 5μC m-2
C. 20μC m-2
D. 8μC m-2
8 Surface density of charge is defined as
A. Charge per unit volume
B. Charge per unit length
C. Charge per unit area
D. Charge per unit mass
9 The thermistors are usually made of
A. Metals with low temperature coefficient of resistivity
B. Metals with high temperature coefficient of resistivity
C. Metal oxides with high temperature coefficient of resistivity
D. Semi conducting materials having low temperature coefficient of resistivity
10 The electrode connected with the positive terminal of the current source is called
A. cathode
B. anode
C. electrolyte
D. position

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