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

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

Question # 2

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

Question # 3

The concept of field theory was put forward by

Question # 4

The nature of capacity of electrostatic capacitor depends on

Question # 5

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

Question # 6

The ohm's is defined as

Question # 7

The SI unit of electric flux is

Question # 8

A heater coil rated at (1000 W - 200 V) is connected to 110 volt line. What will be the power consumed?

Question # 9

The resistance of a conductor does not depend on its

Question # 10

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

Question # 11

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

Question # 12

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

Question # 13

The potential difference across each resistance in series combination is

Question # 14

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 # 15

An alpha particle is accelerated through a potential difference of 106volt. Its kinetic energy will be

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

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 # 18

At any point on the right bisector of the line joining two equal and opposite charges

Question # 19

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 # 20

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

Question # 21

The substances whose resistance decreases with the increase in temperature these substances have coefficient of

Question # 22

The unit of intensity of electric field is

Question # 23

The SI unit of current is

Question # 24

The electric field due to an infinite long thin wire at a distance R varies as

Question # 25

The graphical representation of ohm's law is

Question # 26

A charge Q is divided into two parts q and Q - q and separated by a distance R. The force of repulsion between them will be maximum when

Question # 27

Ohm's law states that

Question # 28

Equal charges are given to two spheres of different radii. The potential will

Question # 29

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 # 30

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

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ECAT Chapter 12 Important MCQ's

Sr.# Question Answer
1 Resistor is a device which convert electric energy to
A. Heat energy
B. Chemical energy
C. Elastic energy
D. All of the above
2 An alpha particle is accelerated through a potential difference of 106volt. Its kinetic energy will be
A. 1 MeV
B. 2 MeV
C. 4 MeV
D. 8 MeV
3 The electrode connected with the positive terminal of the current source is called
A. cathode
B. anode
C. electrolyte
D. position
4 In bringing an electron towards another electron, electrostatic potential energy of system
A. Decreases
B. Increases
C. Remains uncharged
D. Becomes zero
5 Battery is charged in motor cars, which is based on
A. Chemical effect
B. Magnetic effect
C. Electric effect
D. None
6 The fractional change in resistance per kelvin is known as
A. temperature coefficient
B. resistance coefficient
C. super temperature
D. critical temperature
7 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
8 What is the current is a 2 x 106ohm resistor having a potential difference of 2 x 103volts?
A. 10-1A
B. 10-2A
C. 10-4A
D. 1 mA
9 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
A. 1/3 V
B. 2/3 V
C. 3/2 V
D. 3V
10 The SI unit of current is
A. watt
B. coulomb
C. volt
D. ampere

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