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 the two charges in Coulomb's law have double distance between them, then electric force

Question # 2

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

Question # 3

The resistivity of a substance depends upon the

Question # 4

The liquid which conduct current is known as

Question # 5

If the resistance of 2 ohm and 4 ohm are connected in parallel, the equivalent resistance will be

Question # 6

The SI unit of current is

Question # 7

At ordinary temperature, an increase in temperature increases the conductivity of

Question # 8

Heating effect caused by an electric circuit is written

Question # 9

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

Question # 10

In bringing an electron towards another electron, electrostatic potential energy of system

Question # 11

Electric flux is defined by the relation

Question # 12

If a charged spherical conductor of radius 10 cm has potential V at a point distance 5 cm from its centre, then the potential at a point distance 15 cm from the centre will be

Question # 13

The nature of capacity of electrostatic capacitor depends on

Question # 14

Battery is charged in motor cars, which is based on

Question # 15

The SI unit of capacitance is

Question # 16

Specific resistance of a wire depends upon

Question # 17

Three resistors of resistance R each are combined in various ways. Which of the following cannot be obtained?

Question # 18

A wire of radius r has resistance R. If it is stretched to a wire of r/2 radius, then the resistance becomes

Question # 19

Ohm's law states that

Question # 20

A current of 1.6 A is passed through a solution of CuSO4. How many Cu2+ions are liberated in one minute?

Question # 21

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 # 22

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 # 23

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

Question # 24

Resistance of a conductor depends upon

Question # 25

Current provided by a battery is maximum when

Question # 26

One coulomb of charge is created by

Question # 27

The electric flux is linked with a surface will be maximum when

Question # 28

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

Question # 29

When an electron is accelerated through a P.D. of an one volt, it will acquire energy equal to

Question # 30

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

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 A metal plate of thickness half the separation between the capacitor plates of capacitance C is inserted. The new capacitance is
A. C
B. C/2
C. Zero
D. 2C
2 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
A. Increase
B. Decrease
C. Remain F
D. Become 10F/9
3 The speed of randomly moving electrons depends upon
A. pressure
B. volume
C. temperature
D. mass
4 The capacitance of a parallel plate capacitor depends upon
A. Area of the plates
B. Separation between the plates
C. Medium between the plates
D. All of the above
5 Coulomb's force between two point charges depends upon
A. Magnitude of charges
B. Distance between them
C. Medium in which they are located
D. All of the above
6 A (100 W , 200 W) bulb is connected to a 160 V power supply. The power consumption would be
A. 64 W
B. 80 W
C. 100 W
D. 125 W
7 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
8 Solar cell converts sunlight directly into
A. potential energy
B. thermal energy
C. mechanical energy
D. electrical energy
9 Magnetic effect at a point caused due to flow a current depend upon the
A. Quantity of current
B. Distance from current
C. Both the quantity of current and distance from current element
D. None of the all
10 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

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