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

Free electrons are

Question # 2

The ratio of the gravitational force Fgto the electrostatic force Febetween two electrons at the same distance apart is approximately

Question # 3

One coulomb of charge is created by

Question # 4

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

Question # 5

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 # 6

The graphical representation of ohm's law is

Question # 7

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 # 8

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

Question # 9

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

Question # 10

The conductivity of a superconductor is

Question # 11

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

Question # 12

Which one of the following is the unit of electric field intensity

Question # 13

The unit of intensity of electric field is

Question # 14

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

Question # 15

The electrode connected with the positive terminal of the current source is called

Question # 16

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

Question # 17

Which one of the following causes production of heat when current is set up in a wire?

Question # 18

A certain charge liberates 0.8 g of oxygen. The same charge will liberate. how many g of silver?

Question # 19

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

Question # 20

Equal charges are given to two spheres of different radii. The potential will

Question # 21

The fractional change in resistance per kelvin is known as

Question # 22

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

Question # 23

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

Question # 24

Ohm established a relation between

Question # 25

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 # 26

Electric flux is defined by the relation

Question # 27

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 # 28

If the length of the conductor is double and its cross sectional area is halved, its conductance will

Question # 29

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 # 30

The electric intensity at infinite distance from the point charge will be

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 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
A. 0.1 watt
B. 1 watt
C. 10 watt
D. 100 watt
2 One coulomb per second is equal to
A. One volt
B. One ampere
C. One hom
D. One henry
3 Heating effect caused by an electric circuit is written
A. H = I2Rt
B. H = I2R
C. H = IR2t
D. H = IR2
4 Coulomb force, when any material medium is placed between two charges
A. Increases
B. Decreases
C. Remain unchanged
D. None of these
5 The capacity of a parallel plat capacitor depends on the
A. Type to metal used
B. Thickness of plates
C. Potential applied across the plates
D. Separation between the plates
6 For two resistance wires joined in parallel, the resultant resistance is 6/5 ohm. When one of the resistance wire breaks, the effective resistance becomes 2 ohm. The resistance of the broken wire is
A. 3/5 ohm
B. 2 ohm
C. 6/5 ohm
D. 3 ohm
7 One joule is equal to
A. 1.6 x 1019eV
B. 6.25 x 1018eV
C. 1.6 x 1818eV
D. 6.25 x 1019eV
8 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
9 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
10 The capacitance of a parallel plate capacitor depends upon
A. Area of the plates
B. Separation between the plates
C. Medium between the plates
D. All of the above

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