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

One joule is equal to

Question # 2

Calculate the amount of charge flowing in 2 minutes in a wire of resistance 10Ωwhen a potential difference of 20 V is applied between its ends

Question # 3

The nature of capacity of electrostatic capacitor depends on

Question # 4

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

Question # 5

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

Question # 6

If a 40 watt light bulb burns for 2 hours. how much heat is generated

Question # 7

A 60 W bulb operates on 220 V supply. The current flowing through the bulb is

Question # 8

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

Question # 9

The unit of resistance is

Question # 10

If electric and gravitational force on an electron in a uniform electric field will be

Question # 11

The concept of field theory was put forward by

Question # 12

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

Question # 13

The earth's potential is taken as

Question # 14

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

Question # 15

If we increase the distance between two plates of the capacitor, the capacitance will

Question # 16

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

Question # 17

Which one of the following has larger value of relative permitivity Erat room temperature?

Question # 18

The capacitance of a parallel plate capacitor depends upon

Question # 19

A charge of 0.1 c accelerated through a potential difference of 1000V acquires kinetic energy

Question # 20

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

Question # 21

Coulomb's force between two point charges depends upon

Question # 22

The charge carriers in gases are

Question # 23

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 # 24

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

Question # 25

A sheet of aluminium foil of negligible thickness is introduced between the plates of a capacitor. The capacitance of the capacitor

Question # 26

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

Question # 27

Two electric bulbs of 200 W and 100 W have same voltage. If R1and R2be their resistance respectively then

Question # 28

At any point on the right bisector of the line joining two equal and opposite charges

Question # 29

A uniform resistance wire of Length L and diameter d has a resistance R. Another wire of same material has length, 4L and diameter 2d, the resistance will be

Question # 30

The conductivity of a superconductor is

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 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
A. power
B. current
C. resistance
D. temperature
2 The electric intensity at infinite distance from the point charge will be
A. Infinite
B. Positive
C. Zero
D. Negative
3 Calculate the amount of charge flowing in 2 minutes in a wire of resistance 10Ωwhen a potential difference of 20 V is applied between its ends
A. 120 C
B. 240 C
C. 20 C
D. 4 C
4 Ohm established a relation between
A. voltage and resistance
B. voltage and charge
C. voltage and current
D. voltage resistance and charge
5 If the distance of separation between two chares is increased, the electrical potential energy of the system will
A. Increase
B. Decrease
C. May increase or decrease
D. Remain the same
6 A uniform resistance wire of Length L and diameter d has a resistance R. Another wire of same material has length, 4L and diameter 2d, the resistance will be
A. 2 R
B. R
C. R/2
D. R/4
7 A certain charge liberates 0.8 g of oxygen. The same charge will liberate. how many g of silver?
A. 108 g
B. 10.8 g
C. 0.8 g
D. 108/0.8 g
8 The electrode connected with the positive terminal of the current source is called
A. cathode
B. anode
C. electrolyte
D. position
9 Which of the following does not obey ohm's law?
A. Copper
B. Al
C. Diode
D. None
10 Battery is charged in motor cars, which is based on
A. Chemical effect
B. Magnetic effect
C. Electric effect
D. None

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