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

The minimum resistance that can be obtained by connecting 5 resistance of 1/4Ωeach is

Question # 2

An electric charge at rest is

Question # 3

Specific resistance of a wire depends upon

Question # 4

The dot product of electric field intensity E and vector area A is called

Question # 5

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 # 6

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 # 7

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 # 8

If one volt is needed to cause a current of one ampere to flow in a conductor, its resistance is

Question # 9

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

Question # 10

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

Question # 11

A 60 W bulb operates on 220 V supply. The current flowing through the bulb is

Question # 12

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

Question # 13

The energy stored in a charge capacitor

Question # 14

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

Question # 15

The material in the form of wire or rod or plate which leads the current into or cut of the electrolyte is known as

Question # 16

The SI unit of electric flux is

Question # 17

Cause of heat production in a current carrying conductor is

Question # 18

The value of electrical constant of proportionality k is

Question # 19

Free electrons are

Question # 20

The SI unit of current is

Question # 21

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 # 22

The resistance of 20 cm long wire is 10Ω. When the length is changed to 40 cm. The new resistance is

Question # 23

The earth's potential is taken as

Question # 24

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 # 25

Which of the following represents an electric current?

Question # 26

Coulomb force, when any material medium is placed between two charges

Question # 27

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

Question # 28

At any point on the right bisector of the line joining two equal and opposite charges

Question # 29

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

Question # 30

The electric flux is linked with a surface will be maximum when

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 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
2 A 60 W bulb operates on 220 V supply. The current flowing through the bulb is
A. 11/3 A
B. 3 A
C. 3/11 A
D. 6
3 An electron of charge e coulomb passes through a potential difference of V volts its energy in joules will be
A. V/e
B. eV
C. e/V
D. V
4 The SI unit of current is
A. watt
B. coulomb
C. volt
D. ampere
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 A heater coil rated at (1000 W - 200 V) is connected to 110 volt line. What will be the power consumed?
A. 200 W
B. 302.5
C. 250 W
D. 350 W
7 The electric field will be uniform
A. Near a positive point charge
B. Near a negative point charge
C. Between two oppositely charged parallel metal plates
D. None of above
8 A ten ohm electric heater operates on a 110 V line. Calculate the rate at which it develops heat in watts
A. 1310 W
B. 670 W
C. 810 W
D. 1210 W
9 Three resistance 500,500 and 50 ohms are connected in series across 555 volts mains. The current flowing through them will be
A. 0.52 A
B. 1 mA
C. 0.7 mA
D. 1.4 A
10 Magnetic effect at a point caused due to flow a current depend upon the
A. Quantity of current
B. Distance from current
C. Both the quantity of current and distance from current element
D. None of the all

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