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

Which one of the following is the unit of electric field intensity

Question # 2

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

Question # 3

The electric intensity outside the two oppositely charged parallel metal plates is

Question # 4

Consider a spherical shell of metal at he centre of which a positive point charge is kept

Question # 5

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

Question # 6

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

Question # 7

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

Question # 8

Taking the earth to be a spherical conductor of diameter 12.8 x 103km. Its capacity will be

Question # 9

Surface density of charge is defined as

Question # 10

The substances whose resistance decreases with the increase in temperature these substances have coefficient of

Question # 11

Resistance of a conductor is increased, the currant will

Question # 12

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

Question # 13

An electric charge at rest is

Question # 14

The capacitance of a parallel plate capacitor depends upon

Question # 15

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 # 16

The charge carriers in gases are

Question # 17

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

Question # 18

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

Question # 19

Heating effect caused by an electric circuit is written

Question # 20

The colour sequence in a carbon resistor in red, brown, orange and silver. The resistance of the resistor is

Question # 21

The relation between charge 'Q' and current 'I' is given by

Question # 22

An electric dipole is at the centre of a hollow sphere of radius r. The total normal electric flux through the sphere is (here Q is the charge and d is the distance between the two charges of the dipole)

Question # 23

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

Question # 24

The ohm's is defined as

Question # 25

A parallel plate capacitor is first charged and then a dielectric slab is introduced between the plates. The quantity that remains unchanged is

Question # 26

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

Question # 27

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

Question # 28

The earth's potential is taken as

Question # 29

The concept of field theory was put forward by

Question # 30

The capacity of a parallel plat capacitor depends on the

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 A 10 F capacitor is charged to a potential difference of 50 V and is connected to another uncharged capacitor in parallel. Now the common potential difference becomes 20 volt.The capacitance of second capacitor is
A. 10μF
B. 20μF
C. 30μF
D. 15μF
2 The capacitance of a parallel plate capacitor depends upon
A. Area of the plates
B. Separation between the plates
C. Medium between the plates
D. All of the above
3 If the distance of separation between two chares is increased, the electrical potential energy of the system will
A. Increase
B. Decrease
C. May increase or decrease
D. Remain the same
4 Three resistors of resistance 2,3 and 6 ohms are connected in parallel, their equivalent resistance is
A. 11.0 ohm
B. 1.0 ohm
C. 7.0 ohm
D. 3.0 ohm
5 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
A. 1/3 V
B. 2/3 V
C. 3/2 V
D. 3V
6 Three resistance 500,500 and 50 ohms are connected in series across 555 volts mains. The current flowing through them will be
A. 0.52 A
B. 1 mA
C. 0.7 mA
D. 1.4 A
7 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
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 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
10 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
A. 120 C
B. 240 C
C. 20 C
D. 4 C

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