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

In Pakistan electricity is supplied for domestic use at 220 V, it is supplied at 110 V in USA. If the resistance of a 60 W bulb for use in Pakistan is R, the resistance of a 60 W bulb for use in USA will be

Question # 2

A medium of dielectric constant 'K' is introduced between the plates of parallel plate condenser. As a result its capcitance

Question # 3

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 # 4

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

Question # 5

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 # 6

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 # 7

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

Question # 8

The concept of field theory was put forward by

Question # 9

A condenser of capacity 50μF is charged to 10 V.The energy stored is

Question # 10

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

Question # 11

One electron volt is equal to

Question # 12

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

Question # 13

The resistance of an incandescent lamp is

Question # 14

A wire of radius r has resistance R. If it is stretched to a wire of r/2 radius, then the resistance becomes

Question # 15

The value of electrical constant of proportionality k is

Question # 16

The energy stored in a charge capacitor

Question # 17

One joule is equal to

Question # 18

The graphical representation of ohm's law is

Question # 19

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

Question # 20

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 # 21

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

Question # 22

A sheet of aluminium foil of negligible thickness is introduced between the plates of a capacitor. The capacitance of the capacitor

Question # 23

Surface density of charge is defined as

Question # 24

The electric lines of force are

Question # 25

A 60 W bulb operates on 220 V supply. The current flowing through the bulb is

Question # 26

The charge carriers in gases are

Question # 27

The capacitance of a parallel plate capacitor depends upon

Question # 28

In RC series circuit the time during which the capacitor acquires 0.63 times the equilibrium charge is called

Question # 29

The resistivity of a substance depends upon the

Question # 30

Electron volt is the unit of

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 A 10 F capacitor is charged to a potential difference of 50 V and is connected to another uncharged capacitor in parallel. Now the common potential difference becomes 20 volt.The capacitance of second capacitor is
A. 10μF
B. 20μF
C. 30μF
D. 15μF
2 One coulomb per second is equal to
A. One volt
B. One ampere
C. One hom
D. One henry
3 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
4 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
5 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
A. 180 watt
B. 10 watt
C. 20 watt
D. 60 watt
6 The charge carriers in electrolyte are positive and negative
A. protons
B. electrons
C. ions
D. none of these
7 Electron volt is the unit of.
A. Potential difference
B. Energy
C. Resistance
D. Capacitance
8 A piece of fuse wire melts when a current of 15 ampere flows through it. With this current. If it dissipates 22.5 W, the resistance of fuse wire will be
A. Zero
B. 10Ω
C. 1Ω
D. 0.10Ω
9 In a charged capacitor the energy is stored in
A. Both in positive and negative charges
B. Positive charges
C. The edges of the capacitor plates
D. The electric field between the plates
10 The minimum charge on any object can not be less than
A. 1.6 x 10-19C
B. 3.2 x 10-19C
C. 1.0 C
D. 4.8 x 10-19C

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