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

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 # 2

The charge carriers in electrolyte are positive and negative

Question # 3

One coulomb of charge is created by

Question # 4

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

Question # 5

Coulomb's force between two point charges depends upon

Question # 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

Question # 7

A cube of metal is given a positive charge Q. For the above system, which of the following statements is true?

Question # 8

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

Question # 9

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

Question # 10

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

Question # 11

Ohm is the unit of

Question # 12

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

Question # 13

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

Question # 14

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

Question # 15

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)

Question # 16

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 # 17

If a charged spherical conductor of radius 10 cm has potential V at a point distance 5 cm from its centre, then the potential at a point distance 15 cm from the centre will be

Question # 18

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 # 19

The concept of field theory was put forward by

Question # 20

Which of the following represents an electric current?

Question # 21

The force of repulsion between two point charges is F, when these are at a distance 0.1 m apart. Now the point charges are replaced by sphere of radii 5 cm each having the same charge as that of the respective point charges. The distance between their centre is again kept 0.1 m ; then the force of repulsion will

Question # 22

Resistance of a conductor depends upon

Question # 23

One joule is equal to

Question # 24

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 # 25

The electric field will be uniform

Question # 26

A capacitor is charged with a battery and then it is disconnected. A slab of dielectric is now inserted between the plates, then

Question # 27

The resistance of a conductor does not depend on its

Question # 28

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

Question # 29

A parallel plate capacitor is first charged and then a dielectric slab is introduced between the plates. The quantity that remains unchanged is

Question # 30

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

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 Free electrons are
A. tightly bound
B. fixed
C. loosely bound
D. tightly fixed
2 If the distance of separation between two chares is increased, the electrical potential energy of the system will
A. Increase
B. Decrease
C. May increase or decrease
D. Remain the same
3 The unit of intensity of electric field is
A. newton/coluomb
B. jule/coluomb
C. volt x metre
D. newton/metre
4 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
A. 5 volt
B. 3 volt
C. 15 volt
D. 9 volt
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 Thermocouple is an arrangement of two different metals
A. To convert heat energy in to electrical energy
B. To produce more heat
C. To convert heat energy into chemical energy
D. To convert electric energy in to heat energy
7 The ratio of the gravitational force Fgto the electrostatic force Febetween two electrons at the same distance apart is approximately
A. 9.8
B. 24 x 1019
C. 24 x 1042
D. 24 x 10-44
8 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
9 The SI unit of electric flux is
A. Weber
B. Nm2C-1
C. NmC-1
D. Nm-2C
10 The concept of field theory was put forward by
A. Franklin
B. Kepler
C. Oersted
D. Michael Faraday

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