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

Current provided by a battery is maximum when

Question # 2

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

Question # 3

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

Question # 4

The charge per unit time through any cross-section of a conductor is called

Question # 5

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

Question # 6

A proton is about 1840 times heavier than an electron. When it is accelerated by a potential difference of 1 KV, its kinetic energy will be

Question # 7

The potential difference across the conductors should be maintained constant by connecting the ends of wire to the terminal of a device called a source of

Question # 8

The conductivity of a superconductor is

Question # 9

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

Question # 10

If a 40 watt light bulb burns for 2 hours. how much heat is generated

Question # 11

In a charged capacitor the energy is stored in

Question # 12

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

Question # 13

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

Question # 14

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

Question # 15

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

Question # 16

Resistor is a device which convert electric energy to

Question # 17

The SI unit of current is

Question # 18

The resistance of an incandescent lamp is

Question # 19

The electric lines of force are

Question # 20

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 # 21

The fractional change in resistance per kelvin is known as

Question # 22

If the length of the conductor is double and its cross sectional area is halved, its conductance will

Question # 23

Electron volt is the unit of

Question # 24

What is the current is a 2 x 106ohm resistor having a potential difference of 2 x 103volts?

Question # 25

When a dielectric material is introduced between the plates of a charged condenser the electric field between the plates

Question # 26

A point charge A of charge +4μC and another B of charge -1μC are placed in air at a distance 1 m apart. Then the distance of the point on the line joining the charge B, where the resultant electric field is zero, is (in m)

Question # 27

Which one of the following causes production of heat when current is set up in a wire?

Question # 28

The charge carriers in gases are

Question # 29

Equal charges are given to two spheres of different radii. The potential will

Question # 30

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

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 If the resistance of 2 ohm and 4 ohm are connected in parallel, the equivalent resistance will be
A. 6 ohm
B. 4 ohm
C. zero ohm
D. 1.33 ohm
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 One coulomb per second is equal to
A. One volt
B. One ampere
C. One hom
D. One henry
4 Coulomb's force between two point charges depends upon
A. Magnitude of charges
B. Distance between them
C. Medium in which they are located
D. All of the above
5 Three resistors of resistance R each are combined in various ways. Which of the following cannot be obtained?
A. 3RΩ
B. 2R/4Ω
C. R/3Ω
D. 2R/3Ω
6 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
A. 1.92 N
B. 19.2 N
C. 12 N
D. 0.192 N
7 At ordinary temperature, an increase in temperature increases the conductivity of
A. Conductor
B. Semiconductor
C. Insulator
D. Alloy
8 The electric intensity outside the two oppositely charged parallel metal plates is
A. Maximum
B. Minimum
C. Zero
D. Infinite
9 The substances whose resistance decreases with the increase in temperature these substances have coefficient of
A. positive temperature
B. negative temperature
C. absolute temperature
D. zero temperature
10 If 2.2 kilowatt power is transmitted through 1 10 ohm line at 22000 volt, the power loss in the form of heat will be
A. 0.1 watt
B. 1 watt
C. 10 watt
D. 100 watt

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