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

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

Question # 2

The SI unit of current is

Question # 3

Electron volt is the unit of

Question # 4

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 # 5

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

Question # 6

Resistance of a conductor depends upon

Question # 7

A heater coil rated at (1000 W - 200 V) is connected to 110 volt line. What will be the power consumed?

Question # 8

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

Question # 9

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

Question # 10

An electric charge at rest is

Question # 11

Current provided by a battery is maximum when

Question # 12

In a building, there are 15 bulbs of 40 watts, 5 bulbs of 100 watts, 5 fans of 80 watts and a heater of 1 kilowatt. The voltage of the electric main is 220 volts. The minimum efficiency of the main fuse of the building will be

Question # 13

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

Question # 14

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

Question # 15

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

Question # 16

A (100 W , 200 W) bulb is connected to a 160 V power supply. The power consumption would be

Question # 17

The relation V = IR represents

Question # 18

Capacitance of two or more capacitors

Question # 19

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

Question # 20

The resistance of a conductor does not depend on its

Question # 21

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

Question # 22

Electron volt is the unit of.

Question # 23

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

Question # 24

The SI unit of conductivity is

Question # 25

The capacity of a parallel plat capacitor depends on the

Question # 26

The unit of resistance is

Question # 27

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

Question # 28

The force of repulsion between two point charges is F, when these are at a distance 0.1 m apart. Now the point charges are replaced by sphere of radii 5 cm each having the same charge as that of the respective point charges. The distance between their centre is again kept 0.1 m ; then the force of repulsion will

Question # 29

The speed of randomly moving electrons depends upon

Question # 30

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

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 The energy stored in a charge capacitor
A. 1/2CV2
B. 1/2C2V
C. 1/2C/V2
D. None of these
2 The SI unit of electric field intensity is
A. CN-1
B. NC-1or Vm-1
C. JC-1
D. AV-1
3 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
4 The material in the form of wire or rod or plate which leads the current into or cut of the electrolyte is known as
A. voltmeters
B. resistance
C. electrode
D. current
5 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
A. 1 : 2
B. 2 : 1
C. 1 : 4
D. 4 : 1
6 Three resistors of resistance R each are combined in various ways. Which of the following cannot be obtained?
A. 3RΩ
B. 2R/4Ω
C. R/3Ω
D. 2R/3Ω
7 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
A. 0.1 watt
B. 1 watt
C. 10 watt
D. 100 watt
8 106electrons are moving through a wire per second, the current developed is
A. 1.6 x 10-19
B. 1 A
C. 1.6 x 10-15 A
D. 106A
9 One electron volt is equal to
A. 1.6 x 1019eV
B. 6.25 x 1018 eV
C. 1.6 x 1018 eV
D. 6.25 x 1019eV
10 In a charged capacitor the energy is stored in
A. Both in positive and negative charges
B. Positive charges
C. The edges of the capacitor plates
D. The electric field between the plates

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