ECAT Pre General Science Physics Chapter 12 MCQ Test With Answer

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

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

Question # 2

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 # 3

The relation between charge 'Q' and current 'I' is given by

Question # 4

Capacitance of two or more capacitors

Question # 5

Taking the earth to be a spherical conductor of diameter 12.8 x 103km. Its capacity will be

Question # 6

Ohm is the unit of

Question # 7

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

Question # 8

A hollow insulated conduction sphere is given a positive charge of 10μC. What will be the electric field at the centre of the sphere if its radius is 2 meters?

Question # 9

If 2.2 kilowatt power is transmitted through a 10 ohm line at 22000 volt, the power loss in the form of heat will be

Question # 10

The unit of conductance is

Question # 11

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 # 12

The SI unit of capacitance is

Question # 13

When a dielectric material is introduced between the plates of a charged condenser the electric field between the plates

Question # 14

The conductivity of a superconductor is

Question # 15

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

Question # 16

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

Question # 17

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

Question # 18

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

Question # 19

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

Question # 20

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

Question # 21

Surface density of charge is defined as

Question # 22

Heating effect caused by an electric circuit is written

Question # 23

The ohm's is defined as

Question # 24

Two point charge +3μC and +8μC repel each other with a force of 40 N. If a charge of -5μC is added to each of them, then the force between then will become

Question # 25

The fractional change in resistance per kelvin is known as

Question # 26

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

Question # 27

The minimum charge on any object can not be less than

Question # 28

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

Question # 29

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

Question # 30

Electron volt is the unit of

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 One joule is equal to
A. 1.6 x 1019eV
B. 6.25 x 1018eV
C. 1.6 x 1818eV
D. 6.25 x 1019eV
2 Force acting upon a charged particle kept between the plates of a charged condenser if F. IF one of the plates of the condenser is removed, force acting on the same will become
A. Zero
B. F/2
C. F
D. 2F
3 Heating effect caused by an electric circuit is written
A. H = I2Rt
B. H = I2R
C. H = IR2t
D. H = IR2
4 The relation V = IR represents
A. Ampere law
B. Faraday's law
C. Ohm's law
D. Len's law
5 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
6 The minimum charge on any object can not be less than
A. 1.6 x 10-19C
B. 3.2 x 10-19C
C. 1.0 C
D. 4.8 x 10-19C
7 The earth's potential is taken as
A. Negative
B. Positive
C. Zero
D. Infinite
8 Ohm established a relation between
A. voltage and resistance
B. voltage and charge
C. voltage and current
D. voltage resistance and charge
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 A point charge Q is placed at the mid-point of a line joining two charges. 4q and q. if the net force on charge q is zero. then Q must be equal to
A. -q
B. +q
C. -2q
D. +4q

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