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

Electric flux is defined by the relation

Question # 2

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

Question # 3

If the length of the conductor is double and its cross sectional area is halved, its conductance will

Question # 4

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

Question # 5

The SI unit of current is

Question # 6

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

Question # 7

The unit of intensity of electric field is

Question # 8

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

Question # 9

The electric field intensity at a point due to a point charge

Question # 10

The energy stored in a charge capacitor

Question # 11

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

Question # 12

If the distance between the plates of a parallel plate condenser of capacity 10μF is doubled then new capacity will be

Question # 13

The unit of resistivity is

Question # 14

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

Question # 15

In bringing an electron towards another electron, electrostatic potential energy of system

Question # 16

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

Question # 17

If electric and gravitational force on an electron in a uniform electric field will be

Question # 18

Resistance of a conductor is increased, the currant will

Question # 19

A certain charge liberates 0.8 g of oxygen. The same charge will liberate. how many g of silver?

Question # 20

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 # 21

The relation between charge 'Q' and current 'I' is given by

Question # 22

The resistance of a conductor does not depend on its

Question # 23

Calculate the amount of charge flowing in 2 minutes in a wire of resistance 10Ωwhen a potential difference of 20 V is applied between its ends

Question # 24

The electric field will be uniform

Question # 25

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 # 26

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

Question # 27

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

Question # 28

Cause of heat production in a current carrying conductor is

Question # 29

The charge carriers in gases are

Question # 30

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

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 The electrode connected with the positive terminal of the current source is called
A. cathode
B. anode
C. electrolyte
D. position
2 The speed of randomly moving electrons depends upon
A. pressure
B. volume
C. temperature
D. mass
3 The relation between charge 'Q' and current 'I' is given by
A. Q = I/t
B. Q = It
C. Q = I2t
D. Q = I2/t
4 A charge of 0.1 c accelerated through a potential difference of 1000V acquires kinetic energy
A. 200 J
B. 100 J
C. 1000 J
D. 400 J
5 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
A. 7.20 N
B. 11.25 N
C. 22.50 N
D. 45.00
6 Ohm established a relation between
A. voltage and resistance
B. voltage and charge
C. voltage and current
D. voltage resistance and charge
7 Which of the following represents an electric current?
A. C-1
B. CS-1
C. J.S-1
D. dynes-1
8 The electric lines of force are
A. Imaginary
B. Physically existing everywhere
C. Physically existing near the charge
D. All of the above
9 If 2.2 kilowatt power is transmitted through a 10 ohm line at 22000 volt, the power loss in the form of heat will be
A. 0.1 watt
B. 1 watt
C. 10 watt
D. 100 watt
10 The relation between the charge Q of a parallel plate capacitor and the P.D between its plates is
A. Q=V/C
B. Q=C/V
C. Q=1/2CV
D. Q=CV

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