ECAT Pre Computer Science Chapter 12 MCQ Test With Answer

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 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 # 2

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 # 3

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 # 4

An electron of charge e coulomb passes through a potential difference of V volts its energy in joules will be

Question # 5

The earth's potential is taken as

Question # 6

If the length of the conductor is double and its cross sectional area is halved, its conductance will

Question # 7

Surface density of charge is defined as

Question # 8

The speed of randomly moving electrons depends upon

Question # 9

The SI unit of permitivity is

Question # 10

The SI unit of conductivity is

Question # 11

The fractional change in resistance per kelvin is known as

Question # 12

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 # 13

The charge carriers in electrolyte are positive and negative

Question # 14

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

Question # 15

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 The SI unit of electric field intensity is
A. CN-1
B. NC-1or Vm-1
C. JC-1
D. AV-1
2 The unit of conductance is
A. ohm
B. meter
C. mho
D. ohm-meter
3 The SI unit of electric flux is
A. Weber
B. Nm2C-1
C. NmC-1
D. Nm-2C
4 The electrode connected with the positive terminal of the current source is called
A. cathode
B. anode
C. electrolyte
D. position
5 The graphical representation of ohm's law is
A. hyperbola
B. straight line
C. ellipse
D. parabola
6 A (100 W , 200 W) bulb is connected to a 160 V power supply. The power consumption would be
A. 64 W
B. 80 W
C. 100 W
D. 125 W
7 When a dielectric material is introduced between the plates of a charged condenser the electric field between the plates
A. Decreases
B. Increases
C. No change
D. May increase or decresase
8 Electric flux is defined by the relation
A. E.A.
B. E x A
C. E/A
D. none of these
9 A certain charge liberates 0.8 g of oxygen. The same charge will liberate. how many g of silver?
A. 108 g
B. 10.8 g
C. 0.8 g
D. 108/0.8 g
10 The SI unit of permitivity is
A. Nm2C2
B. N-1m-2C2
C. NmC2
D. Nm2C-1

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