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

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

Question # 2

Which one of the following is the unit of electric field intensity

Question # 3

A 50 volt battery is connected across 10 ohm resistor. The current is 4.5 A. The internal resistance of the battery is

Question # 4

Magnetic effect at a point caused due to flow a current depend upon the

Question # 5

The capacity of a parallel plat capacitor depends on the

Question # 6

The nature of capacity of electrostatic capacitor depends on

Question # 7

The electric intensity at infinite distance from the point charge will be

Question # 8

Ohm established a relation between

Question # 9

The speed of randomly moving electrons depends upon

Question # 10

The energy stored in a charge capacitor

Question # 11

The SI unit of conductivity is

Question # 12

If two bulbs one of 60 W and other of 100 W are connected in parallel, then which one of the following will flow more?

Question # 13

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

Question # 14

The unit of intensity of electric field is

Question # 15

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

Question # 16

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

Question # 17

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

Question # 18

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

Question # 19

Ohm's law states that

Question # 20

When three identical bulbs of 60 watt, 200 volt rating are connected in series to a 200 volt supply, the power drawn by them will be

Question # 21

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

Question # 22

A capacitor of capacity 1μF is charged to 1 KV. The energy stored in J

Question # 23

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

Question # 24

A closed surface contains two equal and opposite charges. The net electric flux from the surface will be

Question # 25

Electric generators which convert mechanical energy into

Question # 26

The unit of resistance is

Question # 27

In a voltmeter the conduction takes place due to

Question # 28

Two conductors having the same type of charges are connected by a conducting wire. There would not be any amount of charges on them if

Question # 29

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

Question # 30

Coulomb's force between two point charges depends upon

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 The resistance of 20 cm long wire is 10Ω. When the length is changed to 40 cm. The new resistance is
A. 10Ω
B. 20Ω
C. 30Ω
D. 40Ω
2 The electric flux is linked with a surface will be maximum when
A. The surface is held parallel to the electric field
B. The surface is held perpendicular to the electric field
C. The surface makes an angle of 45° with the electric field
D. All of the above
3 The electric potential at the surface of an atomic nucleus (Z = 50) of radius 9.0 x 10-15 is
A. 9 x 105V
B. 9 V
C. 8 x 106V
D. 80 V
4 The speed of randomly moving electrons depends upon
A. pressure
B. volume
C. temperature
D. mass
5 In Pakistan electricity is supplied for domestic use at 220 V, it is supplied at 110 V in USA. If the resistance of a 60 W bulb for use in Pakistan is R, the resistance of a 60 W bulb for use in USA will be
A. 2 R
B. R/4
C. R/2
D. R
6 The liquid which conduct current is known as
A. heating effect
B. chemical energy
C. electrolyte
D. ohm's law
7 The electric intensity at infinite distance from the point charge will be
A. Infinite
B. Positive
C. Zero
D. Negative
8 At ordinary temperature, an increase in temperature increases the conductivity of
A. Conductor
B. Semiconductor
C. Insulator
D. Alloy
9 The electrode connected with the positive terminal of the current source is called
A. cathode
B. anode
C. electrolyte
D. position
10 The resistance of an incandescent lamp is
A. Smaller when switched on
B. Greater when switched off
C. The same whether it is switch off or switch on
D. Greater when switched on

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