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

00:00
Question # 1

The liquid which conduct current is known as

Question # 2

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

Question # 3

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 # 4

The unit of resistivity is

Question # 5

In a charged capacitor the energy is stored in

Question # 6

The resistivity of a substance depends upon the

Question # 7

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

Question # 8

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

Question # 9

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

Question # 10

A hollow insulated conduction sphere is given a positive charge of 10μC. What will be the electric field at the centre of the sphere if its radius is 2 meters?

Question # 11

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

Question # 12

The statement "the electric force of repulsion or attraction between two point charges is directly proportional to the product of the charges and inversely proportional to square of the distance between them" refer to

Question # 13

A wire is bent into a ring of radius R is given a charge q. The magnitude of the electrical field at the centre of the ring is

Question # 14

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

Question # 15

Which one of the following has larger value of relative permitivity Erat room temperature?

Question # 16

Thermocouple is an arrangement of two different metals

Question # 17

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

Question # 18

The resistance of the given conductor can be increased by

Question # 19

If a charged spherical conductor of radius 10 cm has potential V at a point distance 5 cm from its centre, then the potential at a point distance 15 cm from the centre will be

Question # 20

Resistor is a device which convert electric energy to

Question # 21

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

Question # 22

The capacity of a parallel plat capacitor depends on the

Question # 23

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 # 24

Cause of heat production in a current carrying conductor is

Question # 25

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

Question # 26

The SI unit of conductivity is

Question # 27

Ohm is the unit of

Question # 28

The nature of capacity of electrostatic capacitor depends on

Question # 29

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 # 30

The SI unit of current is

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 The electric field due to an infinite long thin wire at a distance R varies as
A. 1/R
B. 1/R2
C. R
D. R2
2 A condenser of capacity 50μF is charged to 10 V.The energy stored is
A. 1.25 x 10-3J
B. 3.75 x 10-3J
C. 2.5 x 10-3J
D. 5 x 10-3J
3 A medium of dielectric constant 'K' is introduced between the plates of parallel plate condenser. As a result its capcitance
A. Increase k time
B. Decreases k times
C. Decreases 1/K times
D. Remains unchanged
4 Electron volt is the unit of.
A. Potential difference
B. Energy
C. Resistance
D. Capacitance
5 If the two charges in Coulomb's law have double distance between them, then electric force
A. Becomes two-fold
B. Becomes four-fold
C. Remains the same
D. None of these
6 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
A. Increase
B. Decrease
C. Remain F
D. Become 10F/9
7 The material in the form of wire or rod or plate which leads the current into or cut of the electrolyte is known as
A. voltmeters
B. resistance
C. electrode
D. current
8 The electric lines of force are
A. Imaginary
B. Physically existing everywhere
C. Physically existing near the charge
D. All of the above
9 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
10 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
A. negative charges
B. positive charges
C. protons
D. electrons

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    fun day

    02 Mar 2023

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    15 Feb 2019

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