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

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

Question # 2

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

Question # 3

If we increase the distance between two plates of the capacitor, the capacitance will

Question # 4

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

Question # 5

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

Question # 6

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

Question # 7

The electric intensity outside the two oppositely charged parallel metal plates is

Question # 8

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

Question # 9

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 # 10

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 # 11

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

Question # 12

A closed surface contains two equal and opposite charges. The net electric flux from the surface will be

Question # 13

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

Question # 14

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

Question # 15

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

Question # 16

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 # 17

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 # 18

The electric lines of force are

Question # 19

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

Question # 20

The capacity of a parallel plat capacitor depends on the

Question # 21

The unit of intensity of electric field is

Question # 22

In a charged capacitor the energy is stored in

Question # 23

The resistance of the given conductor can be increased by

Question # 24

The electric flux from a closed surface

Question # 25

The excess (equal in number) of electrons that must be placed on each of two small spheres spaced 3 cm apart, with force of repulsion between the spheres to be 10-19N, is

Question # 26

When a dielectric material is introduced between the plates of a charged condenser the electric field between the plates

Question # 27

The conductivity of a superconductor is

Question # 28

Electron volt is the unit of

Question # 29

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

Question # 30

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

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ECAT Class Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 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
A. They have the same potential
B. They have the same amount of charge
C. They have the same capacity
D. They have the same shape
2 The unit of resistivity is
A. ohm
B. ohm-m2
C. ohm-meter
D. ohm-m-1
3 If the resistance of 2 ohm and 4 ohm are connected in parallel, the equivalent resistance will be
A. 6 ohm
B. 4 ohm
C. zero ohm
D. 1.33 ohm
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 The SI unit of conductivity is
A. ohm-m
B. ohm-1m-1
C. ohm-m-1
D. ohm-1m
6 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
7 The unit of conductance is
A. ohm
B. meter
C. mho
D. ohm-meter
8 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
A. 1 : 2
B. 2 : 1
C. 1 : 4
D. 4 : 1
9 The colour sequence in a carbon resistor in red, brown, orange and silver. The resistance of the resistor is
A. 21 x 103+ 10%
B. 23 x 101+ 10%
C. 21 x 103+ 5%
D. 12 x 103+ 5%
10 A conducting wire is drawn to double its length. Final resistivity of the material will be
A. Double of the original one
B. Half of the original one
C. One fourth of the original one
D. Same as original one

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