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

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

Question # 2

In a charged capacitor the energy is stored in

Question # 3

Heating effect caused by an electric circuit is written

Question # 4

The electric flux from a closed surface

Question # 5

The electric lines of force are

Question # 6

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 # 7

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

Question # 8

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

Question # 9

Resistance of a conductor is increased, the currant will

Question # 10

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

Question # 11

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

Question # 12

A metal plate of thickness half the separation between the capacitor plates of capacitance C is inserted. The new capacitance is

Question # 13

The unit of resistivity is

Question # 14

The resistance of an incandescent lamp is

Question # 15

The ratio of the gravitational force Fgto the electrostatic force Febetween two electrons at the same distance apart is approximately

Question # 16

The resistance of the given conductor can be increased by

Question # 17

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

Question # 18

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

Question # 19

In case of a parallel plate capacitor if the plate separation is doubled and plate area is halved, the capacitance becomes

Question # 20

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

Question # 21

The SI unit of electric field intensity is

Question # 22

The potential difference across each resistance in series combination is

Question # 23

At ordinary temperature, an increase in temperature increases the conductivity of

Question # 24

Ohm established a relation between

Question # 25

The conductivity of a superconductor is

Question # 26

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

Question # 27

One electron volt is equal to

Question # 28

The charge carriers in gases are

Question # 29

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

Question # 30

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

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 If the distance between the plates of a parallel plate condenser of capacity 10μF is doubled then new capacity will be
A. 5μF
B. 20μF
C. 10μF
D. 15μF
2 Solar cell converts sunlight directly into
A. potential energy
B. thermal energy
C. mechanical energy
D. electrical energy
3 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
A. -10 N
B. +10 N
C. +20 N
D. -20 N
4 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
5 The SI unit of electric flux is
A. Weber
B. Nm2C-1
C. NmC-1
D. Nm-2C
6 Ohm is the unit of
A. current
B. capacitance
C. energy
D. resistance
7 The electric potential at the surface of an atomic nucleus (Z = 50) of radius 9.0 x 10-15 is
A. 9 x 105V
B. 9 V
C. 8 x 106V
D. 80 V
8 The energy stored in a charge capacitor
A. 1/2CV2
B. 1/2C2V
C. 1/2C/V2
D. None of these
9 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
10 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

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