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

Electric flux is defined by the relation

Question # 2

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

Question # 3

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 # 4

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

Question # 5

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

Question # 6

The resistance of a conductor does not depend on its

Question # 7

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 # 8

When a dielectric material is introduced between the plates of a charged condenser the electric field between the plates

Question # 9

A piece of fuse wire melts when a current of 15 ampere flows through it. With this current. If it dissipates 22.5 W, the resistance of fuse wire will be

Question # 10

Equal charges are given to two spheres of different radii. The potential will

Question # 11

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

Question # 12

In case of a parallel plate capacitor if the plate separation is doubled and plate area is halved, the capacitance becomes

Question # 13

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

Question # 14

One coulomb per second is equal to

Question # 15

Electron volt is the unit of

Question # 16

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 # 17

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 # 18

The SI unit of capacitance is

Question # 19

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 # 20

Force acting upon a charged particle kept between the plates of a charged condenser if F. IF one of the plates of the condenser is removed, force acting on the same will become

Question # 21

The speed of randomly moving electrons depends upon

Question # 22

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

Question # 23

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

Question # 24

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)

Question # 25

The unit of resistance is

Question # 26

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

Question # 27

Cause of heat production in a current carrying conductor is

Question # 28

The SI unit of current is

Question # 29

The resistance of an incandescent lamp is

Question # 30

Two conductors having the same type of charges are connected by a conducting wire. There would not be any amount of charges on them if

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 Specific resistance of a wire depends upon
A. Length
B. Cross-section area
C. Mass
D. None
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 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
4 The resistance of a conductor does not depend on its
A. mass
B. resistivity
C. length
D. cross-sectional area
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
A. 3/5 ohm
B. 2 ohm
C. 6/5 ohm
D. 3 ohm
6 Which of the following represents an electric current?
A. C-1
B. CS-1
C. J.S-1
D. dynes-1
7 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
A. Coulomb's law
B. Gauss's law
C. Biot-Sarwat law
D. Ampere's law
8 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
9 Force acting upon a charged particle kept between the plates of a charged condenser if F. IF one of the plates of the condenser is removed, force acting on the same will become
A. Zero
B. F/2
C. F
D. 2F
10 Which one of the following is the unit of electric field intensity
A. JC-1
B. Vm-1
C. Cm-1
D. CJ-1

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