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

One joule is equal to

Question # 2

A charge of 0.1 c accelerated through a potential difference of 1000V acquires kinetic energy

Question # 3

Electron volt is the unit of

Question # 4

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

Question # 5

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

Question # 6

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

Question # 7

The fractional change in resistance per kelvin is known as

Question # 8

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

Question # 9

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 # 10

The resistance of 20 cm long wire is 10Ω. When the length is changed to 40 cm. The new resistance is

Question # 11

Resistor is a device which convert electric energy to

Question # 12

The unit of resistivity is

Question # 13

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

Question # 14

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

Question # 15

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 # 16

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

Question # 17

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

Question # 18

The concept of field theory was put forward by

Question # 19

If electric and gravitational force on an electron in a uniform electric field will be

Question # 20

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

Question # 21

If we plot graph between potential difference (V) and current (I) obeying ohm's law, it will give us

Question # 22

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 # 23

A charge Q is divided into two parts q and Q - q and separated by a distance R. The force of repulsion between them will be maximum when

Question # 24

The electric flux from a closed surface

Question # 25

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

Question # 26

Taking the earth to be a spherical conductor of diameter 12.8 x 103km. Its capacity will be

Question # 27

Ohm established a relation between

Question # 28

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 # 29

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 # 30

The SI unit of capacitance is

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 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
A. 120 C
B. 240 C
C. 20 C
D. 4 C
2 The liquid which conduct current is known as
A. heating effect
B. chemical energy
C. electrolyte
D. ohm's law
3 If we increase the distance between two plates of the capacitor, the capacitance will
A. Increase
B. Decrease
C. Remain same
D. First increase then decrease
4 An alpha particle is accelerated through a potential difference of 106volt. Its kinetic energy will be
A. 1 MeV
B. 2 MeV
C. 4 MeV
D. 8 MeV
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 A 50 volt battery is connected across 10 ohm resistor. The current is 4.5 A. The internal resistance of the battery is
A. Zero
B. 0.5Ω
C. 1.1Ω
D. 5.0Ω
7 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)
A. 2
B. 1
C. 0.5
D. 1.5
8 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?
A. 60 W bulb
B. 100 W bulb
C. Both equally
D. None of these
9 One coulomb of charge is created by
A. 10 electrons
B. 1.6 x 10-19electrons
C. 6.25 x 1018electrons
D. 6.25 x 1021electrons
10 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

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