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 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

Question # 2

A closed surface contains two equal and opposite charges. The net electric flux from the surface will be

Question # 3

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

Question # 4

One coulomb of charge is created by

Question # 5

Resistance of a conductor depends upon

Question # 6

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

Question # 7

The SI unit of permitivity is

Question # 8

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

Question # 9

The conductivity of a superconductor is

Question # 10

The electric potential at the surface of an atomic nucleus (Z = 50) of radius 9.0 x 10-15 is

Question # 11

The nature of capacity of electrostatic capacitor depends on

Question # 12

Ohm's law states that

Question # 13

Specific resistance of a wire depends upon

Question # 14

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

Question # 15

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 # 16

An electric charge at rest is

Question # 17

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 # 18

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

Question # 19

The force of repulsion between two point charges is F, when these are at a distance 0.1 m apart. Now the point charges are replaced by sphere of radii 5 cm each having the same charge as that of the respective point charges. The distance between their centre is again kept 0.1 m ; then the force of repulsion will

Question # 20

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

Question # 21

The ratio of the gravitational force Fgto the electrostatic force Febetween two electrons at the same distance apart is approximately

Question # 22

In a charged capacitor the energy is stored in

Question # 23

The unit of conductance is

Question # 24

Ohm is the unit of

Question # 25

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 # 26

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

Question # 27

Electric flux is defined by the relation

Question # 28

The speed of randomly moving electrons depends upon

Question # 29

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

Question # 30

A conducting wire is drawn to double its length. Final resistivity of the material will be

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 A capacitor of capacity 1μF is charged to 1 KV. The energy stored in J
A. 5
B. 0.5
C. 0.005
D. 50
2 Which one of the following has larger value of relative permitivity Erat room temperature?
A. Vaccum
B. Air
C. Glass
D. Water
3 Ohm established a relation between
A. voltage and resistance
B. voltage and charge
C. voltage and current
D. voltage resistance and charge
4 The resistance of the given conductor can be increased by
A. Increasing the area
B. Changing resistivity
C. Decreasing the length
D. None of the above because change does not matter because in any case the volume remains the same
5 When an electron is accelerated through a P.D. of an one volt, it will acquire energy equal to
A. One joule
B. One erg
C. One electron volt
D. None of these
6 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
7 Resistor is a device which convert electric energy to
A. Heat energy
B. Chemical energy
C. Elastic energy
D. All of the above
8 The SI unit of capacitance is
A. Farad
B. Henry
C. Ohm
D. Volt
9 A heater coil rated at (1000 W - 200 V) is connected to 110 volt line. What will be the power consumed?
A. 200 W
B. 302.5
C. 250 W
D. 350 W
10 Which one of the following is the unit of electric field intensity
A. JC-1
B. Vm-1
C. Cm-1
D. CJ-1

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