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

Which one of the following has larger value of relative permitivity Erat room temperature?

Question # 2

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

Question # 3

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

Question # 4

Three resistors of resistance 2,3 and 6 ohms are connected in parallel, their equivalent resistance is

Question # 5

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

Question # 6

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 # 7

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 # 8

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

Question # 9

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

Question # 10

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

Question # 11

In case of a parallel plate capacitor if the plate separation is doubled and plate area is halved, the capacitance becomes

Question # 12

One coulomb of charge is created by

Question # 13

A charge of 0.1 c accelerated through a potential difference of 1000V acquires kinetic energy

Question # 14

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

Question # 15

A capacitor of capacity 1μF is charged to 1 KV. The energy stored in J

Question # 16

Physicist George Simon ohm was a

Question # 17

Free electrons are

Question # 18

Magnetic effect at a point caused due to flow a current depend upon the

Question # 19

The resistance of the given conductor can be increased by

Question # 20

An electric charge at rest is

Question # 21

Resistance of a conductor is increased, the currant will

Question # 22

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

Question # 23

Three resistors of resistance R each are combined in various ways. Which of the following cannot be obtained?

Question # 24

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

Question # 25

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

Question # 26

Three resistance 500,500 and 50 ohms are connected in series across 555 volts mains. The current flowing through them will be

Question # 27

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

Question # 28

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

Question # 29

Two point charge +3μC and +8μC repel each other with a force of 40 N. If a charge of -5μC is added to each of them, then the force between then will become

Question # 30

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

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 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
2 Surface density of charge is defined as
A. Charge per unit volume
B. Charge per unit length
C. Charge per unit area
D. Charge per unit mass
3
Question Image
A. 5μF
B. 10μF
C. 3μF
D. 6μF
4 Taking the earth to be a spherical conductor of diameter 12.8 x 103km. Its capacity will be
A. 711μF
B. 611μF
C. 811μF
D. 511μF
5 A piece of fuse wire melts when a current of 15 ampere flows through it. With this current. If it dissipates 22.5 W, the resistance of fuse wire will be
A. Zero
B. 10Ω
C. 1Ω
D. 0.10Ω
6 Which one of the following causes production of heat when current is set up in a wire?
A. Fall of electrons from higher orbits to lower orbits
B. Inter-atomic collisions
C. Inter-electron collisions
D. Collisions of conduction electron with atoms
7 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
8 The electric flux is linked with a surface will be maximum when
A. The surface is held parallel to the electric field
B. The surface is held perpendicular to the electric field
C. The surface makes an angle of 45° with the electric field
D. All of the above
9 In a voltmeter the conduction takes place due to
A. Electrons only
B. Holes only
C. Electrons and holes
D. Electrons and ions
10 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
A. negative charges
B. positive charges
C. protons
D. electrons

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