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

The fractional change in resistance per kelvin is known as

Question # 2

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

Question # 3

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

Question # 4

One electron volt is equal to

Question # 5

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

Question # 6

The ohm's is defined as

Question # 7

An electric charge at rest is

Question # 8

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 # 9

Potentiometer is more sensitive than voltmeter, because

Question # 10

Battery is charged in motor cars, which is based on

Question # 11

Current provided by a battery is maximum when

Question # 12

The relation between the charge Q of a parallel plate capacitor and the P.D between its plates is

Question # 13

If the two charges in Coulomb's law have double distance between them, then electric force

Question # 14

One coulomb per second is equal to

Question # 15

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

Question # 16

Capacitance of two or more capacitors

Question # 17

The SI unit of conductivity is

Question # 18

The charge carriers in gases are

Question # 19

What is the current is a 2 x 106ohm resistor having a potential difference of 2 x 103volts?

Question # 20

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 # 21

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 # 22

Coulomb's force between two point charges depends upon

Question # 23

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

Question # 24

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

Question # 25

The unit of conductance is

Question # 26

One moving a charge of 20 coulombs by 2 cm, 2 J of work is done, then the potential difference between the points is

Question # 27

The current through a metallic conductor is due to the motion of

Question # 28

Heating effect caused by an electric circuit is written

Question # 29

For two resistance wires joined in parallel, the resultant resistance is 6/5 ohm. When one of the resistance wire breaks, the effective resistance becomes 2 ohm. The resistance of the broken wire is

Question # 30

Electron volt is the unit of

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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 Electron volt is the unit of
A. Potential difference
B. Energy
C. Resistance
D. Capacitance
3
Question Image
A. 5μF
B. 10μF
C. 3μF
D. 6μF
4 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
5 The energy stored in a charge capacitor
A. 1/2CV2
B. 1/2C2V
C. 1/2C/V2
D. None of these
6 A (100 W , 200 W) bulb is connected to a 160 V power supply. The power consumption would be
A. 64 W
B. 80 W
C. 100 W
D. 125 W
7 A point charge Q is placed at the mid-point of a line joining two charges. 4q and q. if the net force on charge q is zero. then Q must be equal to
A. -q
B. +q
C. -2q
D. +4q
8 If a 40 watt light bulb burns for 2 hours. how much heat is generated
A. 288 x 103J
B. 288 x 108J
C. 288 x 105J
D. 288 x 106J
9 The liquid which conduct current is known as
A. heating effect
B. chemical energy
C. electrolyte
D. ohm's law
10 The unit of intensity of electric field is
A. newton/coluomb
B. jule/coluomb
C. volt x metre
D. newton/metre

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