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

Physicist George Simon ohm was a

Question # 2

If an electron of charge 'e' is accelerated through a potential difference V., it will acquire energy

Question # 3

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

Question # 4

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 # 5

A hollow insulated conduction sphere is given a positive charge of 10μC. What will be the electric field at the centre of the sphere if its radius is 2 meters?

Question # 6

The resistance of the given conductor can be increased by

Question # 7

Thermocouple is an arrangement of two different metals

Question # 8

The ohm's is defined as

Question # 9

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 # 10

Some charge is being given to a conductor. Then its potential

Question # 11

A 50 volt battery is connected across 10 ohm resistor. The current is 4.5 A. The internal resistance of the battery is

Question # 12

The electric flux is linked with a surface will be maximum when

Question # 13

A wire is bent into a ring of radius R is given a charge q. The magnitude of the electrical field at the centre of the ring is

Question # 14

Force acting upon a charged particle kept between the plates of a charged condenser if F. IF one of the plates of the condenser is removed, force acting on the same will become

Question # 15

The electric lines of force are

Question # 16

Capacitance of two or more capacitors

Question # 17

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

Question # 18

The SI unit of permitivity is

Question # 19

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

Question # 20

The SI unit of electric field intensity is

Question # 21

The thermistors are usually made of

Question # 22

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

Question # 23

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

Question # 24

One electron volt is equal to

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

Resistance of a conductor depends upon

Question # 27

At ordinary temperature, an increase in temperature increases the conductivity of

Question # 28

The capacitance of a parallel plate capacitor depends upon

Question # 29

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 # 30

The SI unit of electric flux is

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 The potential difference across the conductors should be maintained constant by connecting the ends of wire to the terminal of a device called a source of
A. power
B. current
C. resistance
D. temperature
2 One coulomb of charge is created by
A. 10 electrons
B. 1.6 x 10-19electrons
C. 6.25 x 1018electrons
D. 6.25 x 1021electrons
3 Three resistance 500,500 and 50 ohms are connected in series across 555 volts mains. The current flowing through them will be
A. 0.52 A
B. 1 mA
C. 0.7 mA
D. 1.4 A
4 The SI unit of capacitance is
A. Farad
B. Henry
C. Ohm
D. Volt
5 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
6 If the length of the conductor is double and its cross sectional area is halved, its conductance will
A. Increase four fold
B. Become one-fourth
C. Become one-half
D. Remains unchanged
7 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
A. 3/5 ohm
B. 2 ohm
C. 6/5 ohm
D. 3 ohm
8 The SI unit of electric field intensity is
A. CN-1
B. NC-1or Vm-1
C. JC-1
D. AV-1
9 Electron volt is the unit of.
A. Potential difference
B. Energy
C. Resistance
D. Capacitance
10 An electric charge at rest is
A. Only an electric field
B. Only a magnetic field
C. Both electric and magnetic fields
D. None of the above

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