ECAT Pre General Science Physics Chapter 12 MCQ Test With Answer

MCQ's Test For ECAT Pre General Science Physics Chapter 12 Electrostatics

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

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ECAT Pre General Science Physics Chapter 12 Electrostatics

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Question # 1

Which of the following represents an electric current?

Question # 2

Battery is charged in motor cars, which is based on

Question # 3

The capacity of a parallel plat capacitor depends on the

Question # 4

In a building, there are 15 bulbs of 40 watts, 5 bulbs of 100 watts, 5 fans of 80 watts and a heater of 1 kilowatt. The voltage of the electric main is 220 volts. The minimum efficiency of the main fuse of the building will be

Question # 5

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

Question # 6

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

Question # 7

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

Question # 8

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 # 9

The electric field due to an infinite long thin wire at a distance R varies as

Question # 10

The charge carriers in gases are

Question # 11

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

Question # 12

A condenser of capacity 50μF is charged to 10 V.The energy stored is

Question # 13

Solar cell converts sunlight directly into

Question # 14

An electron of charge e coulomb passes through a potential difference of V volts its energy in joules will be

Question # 15

The minimum charge on any object can not be less than

Question # 16

The resistivity of a substance depends upon the

Question # 17

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 # 18

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

Question # 19

The substances whose resistance decreases with the increase in temperature these substances have coefficient of

Question # 20

Which of the following does not obey ohm's law?

Question # 21

The current through a metallic conductor is due to the motion of

Question # 22

The SI unit of capacitance is

Question # 23

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

Question # 24

The unit of resistivity is

Question # 25

A sheet of aluminium foil of negligible thickness is introduced between the plates of a capacitor. The capacitance of the capacitor

Question # 26

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

Question # 27

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

Question # 28

The unit of intensity of electric field is

Question # 29

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

Question # 30

The SI unit of electric field intensity is

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 One electron volt is equal to
A. 1.6 x 1019eV
B. 6.25 x 1018 eV
C. 1.6 x 1018 eV
D. 6.25 x 1019eV
2 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
A. 2 R
B. R
C. R/2
D. R/4
3 Which one of the following has larger value of relative permitivity Erat room temperature?
A. Vaccum
B. Air
C. Glass
D. Water
4 The resistance of an incandescent lamp is
A. Smaller when switched on
B. Greater when switched off
C. The same whether it is switch off or switch on
D. Greater when switched on
5 Electric generators which convert mechanical energy into
A. solar energy
B. thermal energy
C. kinetic energy
D. electrical energy
6 If the length of the conductor is double and its cross sectional area is halved, its conductance will
A. Increase four fold
B. Become one-fourth
C. Become one-half
D. Remains unchanged
7 Capacitance of two or more capacitors
A. Increases in series combination
B. Increases in parallel combination
C. Remains unchanged
D. None of the above
8 The SI unit of capacitance is
A. Farad
B. Henry
C. Ohm
D. Volt
9 The potential difference across each resistance in series combination is
A. same
B. different
C. zero
D. none of these
10 The charge carriers in electrolyte are positive and negative
A. protons
B. electrons
C. ions
D. none of these

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