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

A condenser of capacity 50μF is charged to 10 V.The energy stored is

Question # 2

Heating effect caused by an electric circuit is written

Question # 3

A metal plate of thickness half the separation between the capacitor plates of capacitance C is inserted. The new capacitance is

Question # 4

The relation V = IR represents

Question # 5

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

Question # 6

The resistance of a conductor does not depend on its

Question # 7

If the resistance of 2 ohm and 4 ohm are connected in parallel, the equivalent resistance will be

Question # 8

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

Question # 9

The conductivity of a superconductor is

Question # 10

The value of electrical constant of proportionality k is

Question # 11

Three resistors of resistance R each are combined in various ways. Which of the following cannot be obtained?

Question # 12

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

Question # 13

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 # 14

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

Question # 15

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?

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 If we increase the distance between two plates of the capacitor, the capacitance will
A. Increase
B. Decrease
C. Remain same
D. First increase then decrease
2 The unit of intensity of electric field is
A. newton/coluomb
B. jule/coluomb
C. volt x metre
D. newton/metre
3 The energy required to charge a capacitor of 5μF by connecting D.C. source of 20 KV is
A. 10 KJ
B. 5 KJ
C. 2 KJ
D. 1 KJ
4 One coulomb per second is equal to
A. One volt
B. One ampere
C. One hom
D. One henry
5 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
6 A medium of dielectric constant 'K' is introduced between the plates of parallel plate condenser. As a result its capcitance
A. Increase k time
B. Decreases k times
C. Decreases 1/K times
D. Remains unchanged
7 If the length of the conductor is double and its cross sectional area is halved, its conductance will
A. Increase four fold
B. Become one-fourth
C. Become one-half
D. Remains unchanged
8 Resistance of a conductor is increased, the currant will
A. Decrease
B. Increase
C. Remain the same
D. None of these
9 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
A. 1.92 N
B. 19.2 N
C. 12 N
D. 0.192 N
10 The resistance of a conductor does not depend on its
A. mass
B. resistivity
C. length
D. cross-sectional area

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