ECAT Pre Computer Science Chapter 12 MCQ Test With Answer

MCQ's Test For ECAT Physics Chapter 12 Electrostatics

Try The MCQ's Test For ECAT Physics Chapter 12 Electrostatics

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ECAT Physics Chapter 12 Electrostatics

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Question # 1

If a 40 watt light bulb burns for 2 hours. how much heat is generated

Question # 2

The thermistors are usually made of

Question # 3

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

Question # 4

The material in the form of wire or rod or plate which leads the current into or cut of the electrolyte is known as

Question # 5

A proton is about 1840 times heavier than an electron. When it is accelerated by a potential difference of 1 KV, its kinetic energy will be

Question # 6

Resistance of a conductor is increased, the currant will

Question # 7

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 # 8

The SI unit of current is

Question # 9

Free electrons are

Question # 10

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

Question # 11

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

Question # 12

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

Question # 13

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

Question # 14

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

Question # 15

One joule is equal to

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 The charge carriers in electrolyte are positive and negative
A. protons
B. electrons
C. ions
D. none of these
2 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
3 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
A. 2 R
B. R/4
C. R/2
D. R
4 Electron volt is the unit of.
A. Potential difference
B. Energy
C. Resistance
D. Capacitance
5 The SI unit of conductivity is
A. ohm-m
B. ohm-1m-1
C. ohm-m-1
D. ohm-1m
6 The ohm's is defined as
A. 1 ampere / 1 volts
B. 1 coulomb / 1 volt
C. 1 volt / 1 ampere
D. 1 volt / 1 coulomb
7 A car battery has e.m.f 12 volt and internal resistance 5 x 10-2ohm. If it draws 60 ampere current, the terminal voltage of the battery will be
A. 5 volt
B. 3 volt
C. 15 volt
D. 9 volt
8 A 100 W, 200 V bulb is connected to a 160 volts supply. The actual power consumption would be
A. 64 W
B. 80 W
C. 100 W
D. 125 W
9 If electric and gravitational force on an electron in a uniform electric field will be
A. E=mg/q
B. E=q/mg
C. E=,g/q
D. E=qg/m
10 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

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