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

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

Question # 2

The SI unit of electric field intensity is

Question # 3

The electric flux from a closed surface

Question # 4

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

Question # 5

A charge Q is divided into two parts q and Q - q and separated by a distance R. The force of repulsion between them will be maximum when

Question # 6

An electron of charge e coulomb passes through a potential difference of V volts its energy in joules will be

Question # 7

In a Milikian's oil drop experiment the charge on an oil drop is calculated to be 6.35 x 10-19C. The number of excess electrons on the drop is

Question # 8

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

Question # 9

A 100 W, 200 V bulb is connected to a 160 volts supply. The actual power consumption would be

Question # 10

Potentiometer is more sensitive than voltmeter, because

Question # 11

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 # 12

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

Question # 13

Free electrons are

Question # 14

Surface density of charge is defined as

Question # 15

In a voltmeter the conduction takes place due to

Question # 16

The SI unit of current is

Question # 17

Heating effect caused by an electric circuit is written

Question # 18

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

Question # 19

The liquid which conduct current is known as

Question # 20

The SI unit of electric flux is

Question # 21

If electric and gravitational force on an electron in a uniform electric field will be

Question # 22

Solar cell converts sunlight directly into

Question # 23

A hollow insulated conduction sphere is given a positive charge of 10μC. What will be the electric field at the centre of the sphere if its radius is 2 meters?

Question # 24

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 # 25

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

Question # 26

The potential difference across the conductors should be maintained constant by connecting the ends of wire to the terminal of a device called a source of

Question # 27

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 # 28

Resistance of a conductor is increased, the currant will

Question # 29

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

Question # 30

The unit of resistivity is

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 Resistance of a conductor is increased, the currant will
A. Decrease
B. Increase
C. Remain the same
D. None of these
2 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)
A. Q/4πr2
B. 2Q/4πr2
C. Q.d
D. Zero
3 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
4 The electric potential at the surface of an atomic nucleus (Z = 50) of radius 9.0 x 10-15 is
A. 9 x 105V
B. 9 V
C. 8 x 106V
D. 80 V
5 Electron volt is the unit of.
A. Potential difference
B. Energy
C. Resistance
D. Capacitance
6 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
7 In case of a parallel plate capacitor if the plate separation is doubled and plate area is halved, the capacitance becomes
A. Four-fold
B. One-half
C. One-fourth
D. Zero
8 When an electron is accelerated through a P.D. of an one volt, it will acquire energy equal to
A. One joule
B. One erg
C. One electron volt
D. None of these
9 Battery is charged in motor cars, which is based on
A. Chemical effect
B. Magnetic effect
C. Electric effect
D. None
10 One coulomb per second is equal to
A. One volt
B. One ampere
C. One hom
D. One henry

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