ECAT Pre Engineering Physics Chapter 12 MCQ Test With Answer

MCQ's Test For Physics ECAT Pre Engineering Chapter 12 Electrostatics

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

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Physics ECAT Pre Engineering Chapter 12 Electrostatics

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Question # 1

Capacitance of two or more capacitors

Question # 2

The colour sequence in a carbon resistor in red, brown, orange and silver. The resistance of the resistor is

Question # 3

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

Question # 4

The unit of conductance is

Question # 5

Heating effect caused by an electric circuit is written

Question # 6

What is the current is a 2 x 106ohm resistor having a potential difference of 2 x 103volts?

Question # 7

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

Question # 8

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

Question # 9

The resistance of an incandescent lamp is

Question # 10

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 # 11

Electron volt is the unit of

Question # 12

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

Question # 13

The fractional change in resistance per kelvin is known as

Question # 14

The liquid which conduct current is known as

Question # 15

A charge Q is divided into two parts q and Q - q and separated by a distance R. The force of repulsion between them will be maximum when

Question # 16

In a voltmeter the conduction takes place due to

Question # 17

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

Question # 18

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

Question # 19

The electric potential at the surface of an atomic nucleus (Z = 50) of radius 9.0 x 10-15 is

Question # 20

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

Question # 21

The charge per unit time through any cross-section of a conductor is called

Question # 22

The earth's potential is taken as

Question # 23

The material in the form of wire or rod or plate which leads the current into or cut of the electrolyte is known as

Question # 24

The minimum resistance that can be obtained by connecting 5 resistance of 1/4Ωeach is

Question # 25

If the length of the conductor is double and its cross sectional area is halved, its conductance will

Question # 26

Electric generators which convert mechanical energy into

Question # 27

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

Question # 28

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

Question # 29

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 # 30

A cube of metal is given a positive charge Q. For the above system, which of the following statements is true?

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 The conductivity of a superconductor is
A. Infinite
B. Very large
C. Very small
D. Zero
2 Resistance of a conductor is increased, the currant will
A. Decrease
B. Increase
C. Remain the same
D. None of these
3 In RC series circuit the time during which the capacitor acquires 0.63 times the equilibrium charge is called
A. Time constant
B. Decay constant
C. None of these
D. All of above
4 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
5 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
6 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?
A. Zero
B. 5μC m-2
C. 20μC m-2
D. 8μC m-2
7 A wire of radius r has resistance R. If it is stretched to a wire of r/2 radius, then the resistance becomes
A. 2R
B. 4R
C. 16R
D. Zero
8 The charge carriers in gases are
A. electrons
B. ions
C. protons
D. ions and electrons
9 If one volt is needed to cause a current of one ampere to flow in a conductor, its resistance is
A. one ohm
B. one joule
C. one volt
D. one ampere
10 The substances whose resistance decreases with the increase in temperature these substances have coefficient of
A. positive temperature
B. negative temperature
C. absolute temperature
D. zero temperature

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