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 moving a charge of 20 coulombs by 2 cm, 2 J of work is done, then the potential difference between the points is

Question # 2

The earth's potential is taken as

Question # 3

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

Question # 4

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

Question # 5

The speed of randomly moving electrons depends upon

Question # 6

Solar cell converts sunlight directly into

Question # 7

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

Question # 8

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

Question # 9

Potentiometer is more sensitive than voltmeter, because

Question # 10

The material in the form of wire or rod or plate which leads the current into or cut of the electrolyte is known as

Question # 11

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 # 12

Specific resistance of a wire depends upon

Question # 13

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

Question # 14

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

Question # 15

Cause of heat production in a current carrying conductor is

Question # 16

Three resistance 500,500 and 50 ohms are connected in series across 555 volts mains. The current flowing through them will be

Question # 17

The value of electrical constant of proportionality k is

Question # 18

Electric generators which convert mechanical energy into

Question # 19

The resistance of the given conductor can be increased by

Question # 20

If the distance between the plates of a parallel plate condenser of capacity 10μF is doubled then new capacity will be

Question # 21

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

Question # 22

Resistance of a conductor depends upon

Question # 23

The charge carriers in electrolyte are positive and negative

Question # 24

A conducting wire is drawn to double its length. Final resistivity of the material will be

Question # 25

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

Question # 26

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

Question # 27

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

Question # 28

A closed surface contains two equal and opposite charges. The net electric flux from the surface will be

Question # 29

Ohm is the unit of

Question # 30

The dot product of electric field intensity E and vector area A is called

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 A conducting wire is drawn to double its length. Final resistivity of the material will be
A. Double of the original one
B. Half of the original one
C. One fourth of the original one
D. Same as original one
2 A charge of 0.1 c accelerated through a potential difference of 1000V acquires kinetic energy
A. 200 J
B. 100 J
C. 1000 J
D. 400 J
3 The earth's potential is taken as
A. Negative
B. Positive
C. Zero
D. Infinite
4 The electric intensity at infinite distance from the point charge will be
A. Infinite
B. Positive
C. Zero
D. Negative
5 The capacity of a parallel plat capacitor depends on the
A. Type to metal used
B. Thickness of plates
C. Potential applied across the plates
D. Separation between the plates
6 Ohm's law states that
A. The current through a resistor is directly proportional to the applied voltage
B. The voltage across a resistor is directly proportional to the current passing through it
C. Resistance is the constant of proportionality between the voltage and current
D. all of these
7 The unit of resistance is
A. volt
B. ampere
C. ohm
D. coat
8 The energy stored in a charge capacitor
A. 1/2CV2
B. 1/2C2V
C. 1/2C/V2
D. None of these
9 One joule is equal to
A. 1.6 x 1019eV
B. 6.25 x 1018eV
C. 1.6 x 1818eV
D. 6.25 x 1019eV
10 The minimum resistance that can be obtained by connecting 5 resistance of 1/4Ωeach is
A. 4/5Ω
B. 5/4Ω
C. 20Ω
D. 0.05 Ω

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