ECAT Pre Computer Science Chapter 12 MCQ Test With Answer

MCQ's Test For ECAT Physics Chapter 12 Electrostatics

Try The MCQ's Test For ECAT Physics Chapter 12 Electrostatics

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ECAT Physics Chapter 12 Electrostatics

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Question # 1

Battery is charged in motor cars, which is based on

Question # 2

The nature of capacity of electrostatic capacitor depends on

Question # 3

The capacity of a parallel plat capacitor depends on the

Question # 4

Surface density of charge is defined as

Question # 5

A point charge A of charge +4μC and another B of charge -1μC are placed in air at a distance 1 m apart. Then the distance of the point on the line joining the charge B, where the resultant electric field is zero, is (in m)

Question # 6

Ohm's law states that

Question # 7

The liquid which conduct current is known as

Question # 8

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

Question # 9

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

Question # 10

The resistance of a conductor does not depend on its

Question # 11

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

Question # 12

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

Question # 13

The conductivity of a superconductor is

Question # 14

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

Question # 15

The graphical representation of ohm's law is

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 The resistivity of a substance depends upon the
A. length
B. mass
C. area
D. temperature
2 Ohm established a relation between
A. voltage and resistance
B. voltage and charge
C. voltage and current
D. voltage resistance and charge
3 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
4 Which one of the following has larger value of relative permitivity Erat room temperature?
A. Vaccum
B. Air
C. Glass
D. Water
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 The electrode connected with the positive terminal of the current source is called
A. cathode
B. anode
C. electrolyte
D. position
7 The capacity of a parallel plat capacitor depends on the
A. Type to metal used
B. Thickness of plates
C. Potential applied across the plates
D. Separation between the plates
8 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
9 The excess (equal in number) of electrons that must be placed on each of two small spheres spaced 3 cm apart, with force of repulsion between the spheres to be 10-19N, is
A. 25
B. 225
C. 625
D. 1250
10 Solar cell converts sunlight directly into
A. potential energy
B. thermal energy
C. mechanical energy
D. electrical energy

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