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

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

Question # 2

Specific resistance of a wire depends upon

Question # 3

Which of the following represents an electric current?

Question # 4

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 # 5

The electric field due to an infinite long thin wire at a distance R varies as

Question # 6

Ohm established a relation between

Question # 7

Electric generators which convert mechanical energy into

Question # 8

The energy required to charge a capacitor of 5μF by connecting D.C. source of 20 KV is

Question # 9

Thermocouple is an arrangement of two different metals

Question # 10

A hollow insulated conduction sphere is given a positive charge of 10μC. What will be the electric field at the centre of the sphere if its radius is 2 meters?

Question # 11

Consider a spherical shell of metal at he centre of which a positive point charge is kept

Question # 12

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

Question # 13

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

Question # 14

An electric charge at rest is

Question # 15

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

Question # 16

The charge carriers in electrolyte are positive and negative

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

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

Question # 19

The capacity of a parallel plat capacitor depends on the

Question # 20

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 # 21

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 # 22

The graphical representation of ohm's law is

Question # 23

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 # 24

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

Question # 25

If 2.2 kilowatt power is transmitted through 1 10 ohm line at 22000 volt, the power loss in the form of heat will be

Question # 26

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

Question # 27

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

Question # 28

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

Question # 29

Battery is charged in motor cars, which is based on

Question # 30

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

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 The SI unit of conductivity is
A. ohm-m
B. ohm-1m-1
C. ohm-m-1
D. ohm-1m
2 The resistance of an incandescent lamp is
A. Smaller when switched on
B. Greater when switched off
C. The same whether it is switch off or switch on
D. Greater when switched on
3 If one volt is needed to cause a current of one ampere to flow in a conductor, its resistance is
A. one ohm
B. one joule
C. one volt
D. one ampere
4 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
5 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
6 Which one of the following has larger value of relative permitivity Erat room temperature?
A. Vaccum
B. Air
C. Glass
D. Water
7 If we increase the distance between two plates of the capacitor, the capacitance will
A. Increase
B. Decrease
C. Remain same
D. First increase then decrease
8 A heater coil rated at (1000 W - 200 V) is connected to 110 volt line. What will be the power consumed?
A. 200 W
B. 302.5
C. 250 W
D. 350 W
9 Three resistors of resistance R each are combined in various ways. Which of the following cannot be obtained?
A. 3RΩ
B. 2R/4Ω
C. R/3Ω
D. 2R/3Ω
10 A 60 W bulb operates on 220 V supply. The current flowing through the bulb is
A. 11/3 A
B. 3 A
C. 3/11 A
D. 6

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