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

At any point on the right bisector of the line joining two equal and opposite charges

Question # 2

A one microfarad capacitor of a TV is subjected to 4000 V potential difference. The energy stored in capacitor is

Question # 3

A uniform resistance wire of Length L and diameter d has a resistance R. Another wire of same material has length, 4L and diameter 2d, the resistance will be

Question # 4

Some charge is being given to a conductor. Then its potential

Question # 5

When three identical bulbs of 60 watt, 200 volt rating are connected in series to a 200 volt supply, the power drawn by them will be

Question # 6

Resistor is a device which convert electric energy to

Question # 7

The conductivity of a superconductor is

Question # 8

Physicist George Simon ohm was a

Question # 9

The SI unit of current is

Question # 10

Electric flux is defined by the relation

Question # 11

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

Question # 12

If one volt is needed to cause a current of one ampere to flow in a conductor, its resistance is

Question # 13

If the distance between the plates of a parallel plate condenser of capacity 10μF is doubled then new capacity will be

Question # 14

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

Question # 15

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

Question # 16

A ten ohm electric heater operates on a 110 V line. Calculate the rate at which it develops heat in watts

Question # 17

The statement "the electric force of repulsion or attraction between two point charges is directly proportional to the product of the charges and inversely proportional to square of the distance between them" refer to

Question # 18

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

Question # 19

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

Question # 20

If an electron of charge 'e' is accelerated through a potential difference V., it will acquire energy

Question # 21

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

Question # 22

The resistance of a conductor does not depend on its

Question # 23

Resistance of a conductor is increased, the currant will

Question # 24

The resistance of 20 cm long wire is 10Ω. When the length is changed to 40 cm. The new resistance is

Question # 25

A piece of fuse wire melts when a current of 15 ampere flows through it. With this current. If it dissipates 22.5 W, the resistance of fuse wire will be

Question # 26

The resistance of an incandescent lamp is

Question # 27

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

Question # 28

The capacitance of a parallel plate capacitor depends upon

Question # 29

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 # 30

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

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 A wire is bent into a ring of radius R is given a charge q. The magnitude of the electrical field at the centre of the ring is
A. Two
B. 1/2
C. Zero
D. 3/2
2 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
3 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
4 Electron volt is the unit of
A. Potential difference
B. Energy
C. Resistance
D. Capacitance
5 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
A. 120 C
B. 240 C
C. 20 C
D. 4 C
6 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
7 An electron of charge e coulomb passes through a potential difference of V volts its energy in joules will be
A. V/e
B. eV
C. e/V
D. V
8 One coulomb per second is equal to
A. One volt
B. One ampere
C. One hom
D. One henry
9 Three resistors of resistance 2,3 and 6 ohms are connected in parallel, their equivalent resistance is
A. 11.0 ohm
B. 1.0 ohm
C. 7.0 ohm
D. 3.0 ohm
10 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?
A. 60 W bulb
B. 100 W bulb
C. Both equally
D. None of these

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