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

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

Question # 2

A heater coil rated at (1000 W - 200 V) is connected to 110 volt line. What will be the power consumed?

Question # 3

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

Question # 4

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

Question # 5

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

Question # 6

One coulomb of charge is created by

Question # 7

The SI unit of permitivity is

Question # 8

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

Question # 9

Two point charges A and B separated by a distance R attract each other with a force of 12 x 10-3N. The force between A and B when the charges on them are doubled and distance is halved

Question # 10

The unit of conductance is

Question # 11

The electric lines of force are

Question # 12

Resistance of a conductor depends upon

Question # 13

The energy stored in a charge capacitor

Question # 14

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 # 15

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

Question # 16

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 # 17

A certain charge liberates 0.8 g of oxygen. The same charge will liberate. how many g of silver?

Question # 18

Potentiometer is more sensitive than voltmeter, because

Question # 19

The nature of capacity of electrostatic capacitor depends on

Question # 20

Coulomb's force between two point charges depends upon

Question # 21

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

Question # 22

The capacity of a parallel plat capacitor depends on the

Question # 23

Electric potential of earth is taken to be zero because the earth is good

Question # 24

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

Question # 25

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

Question # 26

The force between two chares 0.06 m apart is 5 N. If each charge is moved towards the other by 0.01 m, then the force between them will become

Question # 27

Three resistors of resistance 2,3 and 6 ohms are connected in parallel, their equivalent resistance is

Question # 28

Current provided by a battery is maximum when

Question # 29

A 10 F capacitor is charged to a potential difference of 50 V and is connected to another uncharged capacitor in parallel. Now the common potential difference becomes 20 volt.The capacitance of second capacitor is

Question # 30

The unit of resistance is

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 The material in the form of wire or rod or plate which leads the current into or cut of the electrolyte is known as
A. voltmeters
B. resistance
C. electrode
D. current
2 The resistance of the given conductor can be increased by
A. Increasing the area
B. Changing resistivity
C. Decreasing the length
D. None of the above because change does not matter because in any case the volume remains the same
3 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
4 Ohm's law states that
A. The current through a resistor is directly proportional to the applied voltage
B. The voltage across a resistor is directly proportional to the current passing through it
C. Resistance is the constant of proportionality between the voltage and current
D. all of these
5 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
6 A capacitor is charged with a battery and then it is disconnected. A slab of dielectric is now inserted between the plates, then
A. The charge in the plates reduces and potential difference increase
B. Potential difference between the plates increase, stored energy decreases and charge remains the same
C. Potential difference between the plates decreases and charge remains unchanged
D. None of the above
7 The fractional change in resistance per kelvin is known as
A. temperature coefficient
B. resistance coefficient
C. super temperature
D. critical temperature
8 A sheet of aluminium foil of negligible thickness is introduced between the plates of a capacitor. The capacitance of the capacitor
A. Increases
B. Decreases
C. Remain unchanged
D. Becomes infinite
9 The resistance of a conductor does not depend on its
A. mass
B. resistivity
C. length
D. cross-sectional area
10 If electric and gravitational force on an electron in a uniform electric field will be
A. E=mg/q
B. E=q/mg
C. E=,g/q
D. E=qg/m

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