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

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

Question # 2

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 # 3

One joule is equal to

Question # 4

The unit of resistance is

Question # 5

The SI unit of electric flux is

Question # 6

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 # 7

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 # 8

In a charged capacitor the energy is stored in

Question # 9

Electric generators which convert mechanical energy into

Question # 10

The charge per unit time through any cross-section of a conductor is called

Question # 11

The charge carriers in electrolyte are positive and negative

Question # 12

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

Question # 13

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

Question # 14

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

Question # 15

The graphical representation of ohm's law is

Question # 16

Resistance of a conductor depends upon

Question # 17

The SI unit of capacitance is

Question # 18

Thermocouple is an arrangement of two different metals

Question # 19

The resistance of 20 cm long wire is 10Ω. When the length is changed to 40 cm. The new resistance is

Question # 20

A 100 W, 200 V bulb is connected to a 160 volts supply. The actual power consumption would be

Question # 21

When three identical bulbs of 60 watt, 200 volt rating are connected in series to a 200 volt supply, the power drawn by them will be

Question # 22

Electric flux is defined by the relation

Question # 23

The electric flux is linked with a surface will be maximum when

Question # 24

The SI unit of current is

Question # 25

The ohm's is defined as

Question # 26

If we plot graph between potential difference (V) and current (I) obeying ohm's law, it will give us

Question # 27

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

Question # 28

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 # 29

When an electron is accelerated through a P.D. of an one volt, it will acquire energy equal to

Question # 30

Free electrons are

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 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
2 When an electron is accelerated through a P.D. of an one volt, it will acquire energy equal to
A. One joule
B. One erg
C. One electron volt
D. None of these
3 One moving a charge of 20 coulombs by 2 cm, 2 J of work is done, then the potential difference between the points is
A. 0.1 V
B. 8 V
C. 2 V
D. 0.5 V
4 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?
A. Zero
B. 5μC m-2
C. 20μC m-2
D. 8μC m-2
5 A wire of radius r has resistance R. If it is stretched to a wire of r/2 radius, then the resistance becomes
A. 2R
B. 4R
C. 16R
D. Zero
6 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
7 The current through a metallic conductor is due to the motion of
A. protons
B. neutrons
C. electrons
D. free electrons
8 In RC series circuit the time during which the capacitor acquires 0.63 times the equilibrium charge is called
A. Time constant
B. Decay constant
C. None of these
D. All of above
9 The dot product of electric field intensity E and vector area A is called
A. Electric potential
B. Electric flux
C. Electric field
D. Magnetic field
10 A certain charge liberates 0.8 g of oxygen. The same charge will liberate. how many g of silver?
A. 108 g
B. 10.8 g
C. 0.8 g
D. 108/0.8 g

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