ECAT Pre General Science Physics Chapter 12 MCQ Test With Answer

MCQ's Test For ECAT Pre General Science Physics Chapter 12 Electrostatics

Try The MCQ's Test For ECAT Pre General Science Physics Chapter 12 Electrostatics

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ECAT Pre General Science Physics Chapter 12 Electrostatics

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Question # 1

A heater coil rated at (1000 W - 200 V) is connected to 110 volt line. What will be the power consumed?

Question # 2

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

Question # 3

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

Question # 4

An electric charge at rest is

Question # 5

Capacitance of two or more capacitors

Question # 6

Current provided by a battery is maximum when

Question # 7

The energy stored in a charge capacitor

Question # 8

The SI unit of conductivity is

Question # 9

The unit of resistance is

Question # 10

Resistor is a device which convert electric energy to

Question # 11

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

Question # 12

The energy required to charge a capacitor of 5μF by connecting D.C. source of 20 KV is

Question # 13

The relation V = IR represents

Question # 14

If we plot graph between potential difference (V) and current (I) obeying ohm's law, it will give us

Question # 15

Solar cell converts sunlight directly into

Question # 16

Surface density of charge is defined as

Question # 17

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

Question # 18

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 # 19

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

Question # 20

The nature of capacity of electrostatic capacitor depends on

Question # 21

106electrons are moving through a wire per second, the current developed is

Question # 22

A 10 F capacitor is charged to a potential difference of 50 V and is connected to another uncharged capacitor in parallel. Now the common potential difference becomes 20 volt.The capacitance of second capacitor is

Question # 23

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 # 24

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

Question # 25

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 # 26

Electric flux is defined by the relation

Question # 27

The capacitance of a parallel plate capacitor depends upon

Question # 28

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 # 29

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 # 30

An alpha particle is accelerated through a potential difference of 106volt. Its kinetic energy will be

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 The SI unit of capacitance is
A. Farad
B. Henry
C. Ohm
D. Volt
2 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
A. q = Q/4
B. q = Q/2
C. q = !
D. None of these
3 Ohm established a relation between
A. voltage and resistance
B. voltage and charge
C. voltage and current
D. voltage resistance and charge
4 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
5 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
6 Three resistors of resistance R each are combined in various ways. Which of the following cannot be obtained?
A. 3RΩ
B. 2R/4Ω
C. R/3Ω
D. 2R/3Ω
7 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
8 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
9 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
10 Which of the following does not obey ohm's law?
A. Copper
B. Al
C. Diode
D. None

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