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

A closed surface contains two equal and opposite charges. The net electric flux from the surface will be

Question # 2

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

Question # 3

The minimum charge on any object can not be less than

Question # 4

The fractional change in resistance per kelvin is known as

Question # 5

A proton is about 1840 times heavier than an electron. When it is accelerated by a potential difference of 1 KV, its kinetic energy will be

Question # 6

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 # 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 graphical representation of ohm's law is

Question # 9

The potential difference across each resistance in series combination is

Question # 10

The capacity of a parallel plat capacitor depends on the

Question # 11

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

Question # 12

Surface density of charge is defined as

Question # 13

A point charge Q is placed at the mid-point of a line joining two charges. 4q and q. if the net force on charge q is zero. then Q must be equal to

Question # 14

A medium of dielectric constant 'K' is introduced between the plates of parallel plate condenser. As a result its capcitance

Question # 15

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

Question # 16

The thermistors are usually made of

Question # 17

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 # 18

The electric field will be uniform

Question # 19

Resistance of a conductor depends upon

Question # 20

The resistance of a conductor does not depend on its

Question # 21

A car battery has e.m.f 12 volt and internal resistance 5 x 10-2ohm. If it draws 60 ampere current, the terminal voltage of the battery will be

Question # 22

The resistance of the given conductor can be increased by

Question # 23

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

Question # 24

The charge per unit time through any cross-section of a conductor is called

Question # 25

If the two charges in Coulomb's law have double distance between them, then electric force

Question # 26

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 # 27

If 2.2 kilowatt power is transmitted through 1 10 ohm line at 22000 volt, the power loss in the form of heat will be

Question # 28

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

Question # 29

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

Question # 30

Solar cell converts sunlight directly into

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 The charge carriers in electrolyte are positive and negative
A. protons
B. electrons
C. ions
D. none of these
2 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
A. 25
B. 225
C. 625
D. 1250
3 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
4 The unit of conductance is
A. ohm
B. meter
C. mho
D. ohm-meter
5 If the distance between the plates of a parallel plate condenser of capacity 10μF is doubled then new capacity will be
A. 5μF
B. 20μF
C. 10μF
D. 15μF
6 Some charge is being given to a conductor. Then its potential
A. Is maximum at surface
B. Is maximum at centre
C. Is remain same throughout the conductor
D. Is maximum somewhere between surface and centre
7 The resistance of 20 cm long wire is 10Ω. When the length is changed to 40 cm. The new resistance is
A. 10Ω
B. 20Ω
C. 30Ω
D. 40Ω
8 Ohm is the unit of
A. current
B. capacitance
C. energy
D. resistance
9 A cube of metal is given a positive charge Q. For the above system, which of the following statements is true?
A. Electric potential at the surface of the cube is zero
B. Electric potential within the cube is zero
C. Electric filed is normal to the surface of the cube
D. Electric filed varies within the cube
10 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

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