ECAT Pre Computer Science Chapter 12 MCQ Test With Answer

MCQ's Test For ECAT Physics Chapter 12 Electrostatics

Try The MCQ's Test For ECAT Physics Chapter 12 Electrostatics

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ECAT Physics Chapter 12 Electrostatics

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Question # 1

The minimum charge on any object can not be less than

Question # 2

Current provided by a battery is maximum when

Question # 3

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

Question # 4

Physicist George Simon ohm was a

Question # 5

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

Question # 6

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

Question # 7

The excess (equal in number) of electrons that must be placed on each of two small spheres spaced 3 cm apart, with force of repulsion between the spheres to be 10-19N, is

Question # 8

Two point charge +3μC and +8μC repel each other with a force of 40 N. If a charge of -5μC is added to each of them, then the force between then will become

Question # 9

One coulomb per second is equal to

Question # 10

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

Question # 11

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

Question # 12

The electric flux from a closed surface

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

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 # 15

If one volt is needed to cause a current of one ampere to flow in a conductor, its resistance is

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 The electric intensity outside the two oppositely charged parallel metal plates is
A. Maximum
B. Minimum
C. Zero
D. Infinite
2 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
3 The SI unit of electric field intensity is
A. CN-1
B. NC-1or Vm-1
C. JC-1
D. AV-1
4 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
5 The dot product of electric field intensity E and vector area A is called
A. Electric potential
B. Electric flux
C. Electric field
D. Magnetic field
6 Which of the following represents an electric current?
A. C-1
B. CS-1
C. J.S-1
D. dynes-1
7 The SI unit of capacitance is
A. Farad
B. Henry
C. Ohm
D. Volt
8 A 60 W bulb operates on 220 V supply. The current flowing through the bulb is
A. 11/3 A
B. 3 A
C. 3/11 A
D. 6
9 A wire of radius r has resistance R. If it is stretched to a wire of r/2 radius, then the resistance becomes
A. 2R
B. 4R
C. 16R
D. Zero
10 A heater coil rated at (1000 W - 200 V) is connected to 110 volt line. What will be the power consumed?
A. 200 W
B. 302.5
C. 250 W
D. 350 W

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