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

In a building, there are 15 bulbs of 40 watts, 5 bulbs of 100 watts, 5 fans of 80 watts and a heater of 1 kilowatt. The voltage of the electric main is 220 volts. The minimum efficiency of the main fuse of the building will be

Question # 2

Thermocouple is an arrangement of two different metals

Question # 3

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 # 4

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

Question # 5

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

Question # 6

The SI unit of permitivity is

Question # 7

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 # 8

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

Question # 9

The ohm's is defined as

Question # 10

If the resistance of 2 ohm and 4 ohm are connected in parallel, the equivalent resistance will be

Question # 11

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

Question # 12

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 # 13

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 # 14

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

Question # 15

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

Question # 16

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 # 17

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

Question # 18

One joule is equal to

Question # 19

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 # 20

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

Question # 21

The nature of capacity of electrostatic capacitor depends on

Question # 22

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 # 23

If 2.2 kilowatt power is transmitted through a 10 ohm line at 22000 volt, the power loss in the form of heat will be

Question # 24

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 # 25

One coulomb per second is equal to

Question # 26

Electric potential of earth is taken to be zero because the earth is good

Question # 27

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

Question # 28

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 # 29

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

Question # 30

The relation between the charge Q of a parallel plate capacitor and the P.D between its plates is

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 The liquid which conduct current is known as
A. heating effect
B. chemical energy
C. electrolyte
D. ohm's law
2 The resistance of a conductor does not depend on its
A. mass
B. resistivity
C. length
D. cross-sectional area
3 An electric charge at rest is
A. Only an electric field
B. Only a magnetic field
C. Both electric and magnetic fields
D. None of the above
4 The charge carriers in electrolyte are positive and negative
A. protons
B. electrons
C. ions
D. none of these
5 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
A. -q
B. +q
C. -2q
D. +4q
6 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
7 The fractional change in resistance per kelvin is known as
A. temperature coefficient
B. resistance coefficient
C. super temperature
D. critical temperature
8 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
A. Coulomb's law
B. Gauss's law
C. Biot-Sarwat law
D. Ampere's law
9 Potentiometer is more sensitive than voltmeter, because
A. Voltmeter has a very high resistance
B. Voltmeter has a very low resistance
C. Potentiometer does not draw any current from a source of unknown potential difference
D. Potentiometer is sensitive
10 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
A. -10 N
B. +10 N
C. +20 N
D. -20 N

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