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 force of repulsion between two point charges is F, when these are at a distance 0.1 m apart. Now the point charges are replaced by sphere of radii 5 cm each having the same charge as that of the respective point charges. The distance between their centre is again kept 0.1 m ; then the force of repulsion will

Question # 2

The conventional current in a circuit is defined as " current which passes from a point at higher potential to a point at lower potential as if it represent a movement of

Question # 3

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

Question # 4

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

Question # 5

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 # 6

The resistivity of a substance depends upon the

Question # 7

The unit of resistance is

Question # 8

The resistance of an incandescent lamp is

Question # 9

The relation V = IR represents

Question # 10

The unit of intensity of electric field is

Question # 11

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

Question # 12

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

Question # 13

An alpha particle is accelerated through a potential difference of 106volt. Its kinetic energy will be

Question # 14

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 # 15

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

Question # 16

The unit of resistivity is

Question # 17

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

Question # 18

The SI unit of permitivity is

Question # 19

If the distance of separation between two chares is increased, the electrical potential energy of the system will

Question # 20

The SI unit of capacitance is

Question # 21

If we increase the distance between two plates of the capacitor, the capacitance will

Question # 22

The potential difference across each resistance in series combination is

Question # 23

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

Question # 24

The graphical representation of ohm's law is

Question # 25

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 # 26

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

Question # 27

106electrons are moving through a wire per second, the current developed is

Question # 28

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 # 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

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

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 Which one of the following has larger value of relative permitivity Erat room temperature?
A. Vaccum
B. Air
C. Glass
D. Water
2 Ohm established a relation between
A. voltage and resistance
B. voltage and charge
C. voltage and current
D. voltage resistance and charge
3 One moving a charge of 20 coulombs by 2 cm, 2 J of work is done, then the potential difference between the points is
A. 0.1 V
B. 8 V
C. 2 V
D. 0.5 V
4 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
A. 7.20 N
B. 11.25 N
C. 22.50 N
D. 45.00
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 At ordinary temperature, an increase in temperature increases the conductivity of
A. Conductor
B. Semiconductor
C. Insulator
D. Alloy
7 A 60 W bulb operates on 220 V supply. The current flowing through the bulb is
A. 11/3 A
B. 3 A
C. 3/11 A
D. 6
8 The unit of conductance is
A. ohm
B. meter
C. mho
D. ohm-meter
9 Capacitance of two or more capacitors
A. Increases in series combination
B. Increases in parallel combination
C. Remains unchanged
D. None of the above
10 An electric dipole is at the centre of a hollow sphere of radius r. The total normal electric flux through the sphere is (here Q is the charge and d is the distance between the two charges of the dipole)
A. Q/4πr2
B. 2Q/4πr2
C. Q.d
D. Zero

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