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

The SI unit of capacitance is

Question # 2

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

Question # 3

Resistor is a device which convert electric energy to

Question # 4

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

Question # 5

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 # 6

The electric field intensity at a point due to a point charge

Question # 7

An electric charge at rest is

Question # 8

The electrode connected with the positive terminal of the current source is called

Question # 9

If 2.2 kilowatt power is transmitted through a 10 ohm line at 22000 volt, the power loss in the form of heat will be

Question # 10

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

Question # 11

Specific resistance of a wire depends upon

Question # 12

The thermistors are usually made of

Question # 13

One coulomb of charge is created by

Question # 14

A 60 W bulb operates on 220 V supply. The current flowing through the bulb is

Question # 15

The nature of capacity of electrostatic capacitor depends on

Question # 16

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

Question # 17

In bringing an electron towards another electron, electrostatic potential energy of system

Question # 18

One joule is equal to

Question # 19

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 # 20

The ohm's is defined as

Question # 21

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 # 22

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

Question # 23

If we increase the distance between two plates of the capacitor, the capacitance will

Question # 24

The concept of field theory was put forward by

Question # 25

Potentiometer is more sensitive than voltmeter, because

Question # 26

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 # 27

The SI unit of electric field intensity is

Question # 28

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

Question # 29

The minimum charge on any object can not be less than

Question # 30

The unit of intensity of electric field is

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1
Question Image
A. 5μF
B. 10μF
C. 3μF
D. 6μF
2 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
3 Free electrons are
A. tightly bound
B. fixed
C. loosely bound
D. tightly fixed
4 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
5 The electric intensity outside the two oppositely charged parallel metal plates is
A. Maximum
B. Minimum
C. Zero
D. Infinite
6 Resistance of a conductor is increased, the currant will
A. Decrease
B. Increase
C. Remain the same
D. None of these
7 A capacitor is charged with a battery and then it is disconnected. A slab of dielectric is now inserted between the plates, then
A. The charge in the plates reduces and potential difference increase
B. Potential difference between the plates increase, stored energy decreases and charge remains the same
C. Potential difference between the plates decreases and charge remains unchanged
D. None of the above
8 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
9 The force between two chares 0.06 m apart is 5 N. If each charge is moved towards the other by 0.01 m, then the force between them will become
A. 7.20 N
B. 11.25 N
C. 22.50 N
D. 45.00
10 Physicist George Simon ohm was a
A. German physical
B. French physicist
C. Chinese physicist
D. Russian physicist

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