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

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

Question # 2

The charge carriers in electrolyte are positive and negative

Question # 3

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

Question # 4

Battery is charged in motor cars, which is based on

Question # 5

The unit of conductance is

Question # 6

If a 40 watt light bulb burns for 2 hours. how much heat is generated

Question # 7

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 # 8

The powers of tow electric bulbs are 100 W and 200 W. Both of them are joined with 220 V mains. The ratio of resistances of their filaments will be

Question # 9

Surface density of charge is defined as

Question # 10

Potentiometer is more sensitive than voltmeter, because

Question # 11

Two electric bulbs of 200 W and 100 W have same voltage. If R1and R2be their resistance respectively then

Question # 12

A current of 1.6 A is passed through a solution of CuSO4. How many Cu2+ions are liberated in one minute?

Question # 13

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

Question # 14

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 # 15

A wire of radius r has resistance R. If it is stretched to a wire of r/2 radius, then the resistance becomes

Question # 16

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

Question # 17

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

Question # 18

The graphical representation of ohm's law is

Question # 19

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

Question # 20

A capacitor is charged with a battery and then it is disconnected. A slab of dielectric is now inserted between the plates, then

Question # 21

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

Question # 22

The relation between the charge Q of a parallel plate capacitor and the P.D between its plates is

Question # 23

When an electron is accelerated through a P.D. of an one volt, it will acquire energy equal to

Question # 24

The resistance of a conductor does not depend on its

Question # 25

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 # 26

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 # 27

If the distance of separation between two chares is increased, the electrical potential energy of the system will

Question # 28

The resistance of an incandescent lamp is

Question # 29

In a voltmeter the conduction takes place due to

Question # 30

A uniform resistance wire of Length L and diameter d has a resistance R. Another wire of same material has length, 4L and diameter 2d, the resistance will be

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 The electric lines of force are
A. Imaginary
B. Physically existing everywhere
C. Physically existing near the charge
D. All of the above
2 One coulomb of charge is created by
A. 10 electrons
B. 1.6 x 10-19electrons
C. 6.25 x 1018electrons
D. 6.25 x 1021electrons
3 Thermocouple is an arrangement of two different metals
A. To convert heat energy in to electrical energy
B. To produce more heat
C. To convert heat energy into chemical energy
D. To convert electric energy in to heat energy
4 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
5 Free electrons are
A. tightly bound
B. fixed
C. loosely bound
D. tightly fixed
6 The conventional current in a circuit is defined as " current which passes from a point at higher potential to a point at lower potential as if it represent a movement of
A. negative charges
B. positive charges
C. protons
D. electrons
7 The potential difference across each resistance in series combination is
A. same
B. different
C. zero
D. none of these
8 Resistor is a device which convert electric energy to
A. Heat energy
B. Chemical energy
C. Elastic energy
D. All of the above
9 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
10 The electric field due to an infinite long thin wire at a distance R varies as
A. 1/R
B. 1/R2
C. R
D. R2

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