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 electric intensity at infinite distance from the point charge will be

Question # 2

The concept of field theory was put forward by

Question # 3

The thermistors are usually made of

Question # 4

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

Question # 5

Ohm's law states that

Question # 6

In a Milikian's oil drop experiment the charge on an oil drop is calculated to be 6.35 x 10-19C. The number of excess electrons on the drop is

Question # 7

The ohm's is defined as

Question # 8

The charge carriers in gases are

Question # 9

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 # 10

Electron volt is the unit of

Question # 11

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

Question # 12

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

Question # 13

Battery is charged in motor cars, which is based on

Question # 14

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 # 15

A metal plate of thickness half the separation between the capacitor plates of capacitance C is inserted. The new capacitance is

Question # 16

The liquid which conduct current is known as

Question # 17

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 # 18

Which of the following does not obey ohm's law?

Question # 19

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 # 20

Capacitance of two or more capacitors

Question # 21

The SI unit of electric field intensity is

Question # 22

The dot product of electric field intensity E and vector area A is called

Question # 23

The SI unit of electric flux is

Question # 24

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

Question # 25

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

A ten ohm electric heater operates on a 110 V line. Calculate the rate at which it develops heat in watts

Question # 28

At ordinary temperature, an increase in temperature increases the conductivity of

Question # 29

Physicist George Simon ohm was a

Question # 30

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)

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 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
2 The charge carriers in electrolyte are positive and negative
A. protons
B. electrons
C. ions
D. none of these
3 When a dielectric material is introduced between the plates of a charged condenser the electric field between the plates
A. Decreases
B. Increases
C. No change
D. May increase or decresase
4 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
5 Two electric bulbs of 200 W and 100 W have same voltage. If R1and R2be their resistance respectively then
A. R1= 2R2
B. R2= 2R1
C. R2 = 4R1
D. R1= 4R2
6 The SI unit of electric flux is
A. Weber
B. Nm2C-1
C. NmC-1
D. Nm-2C
7 Which one of the following has larger value of relative permitivity Erat room temperature?
A. Vaccum
B. Air
C. Glass
D. Water
8 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
9 Physicist George Simon ohm was a
A. German physical
B. French physicist
C. Chinese physicist
D. Russian physicist
10 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

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