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 unit of resistivity is

Question # 2

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 # 3

If two bulbs one of 60 W and other of 100 W are connected in parallel, then which one of the following will flow more?

Question # 4

Resistance of a conductor is increased, the currant will

Question # 5

The earth's potential is taken as

Question # 6

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 # 7

Solar cell converts sunlight directly into

Question # 8

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 # 9

Electron volt is the unit of.

Question # 10

The electric field intensity at a point due to a point charge

Question # 11

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 # 12

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 # 13

Taking the earth to be a spherical conductor of diameter 12.8 x 103km. Its capacity will be

Question # 14

Physicist George Simon ohm was a

Question # 15

A capacitor of capacity 1μF is charged to 1 KV. The energy stored in J

Question # 16

Specific resistance of a wire depends upon

Question # 17

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

Question # 18

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

Question # 19

The SI unit of conductivity is

Question # 20

The SI unit of electric flux is

Question # 21

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 # 22

A point charge A of charge +4μC and another B of charge -1μC are placed in air at a distance 1 m apart. Then the distance of the point on the line joining the charge B, where the resultant electric field is zero, is (in m)

Question # 23

The electric flux from a closed surface

Question # 24

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 # 25

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

Question # 26

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

Question # 27

The potential difference across each resistance in series combination is

Question # 28

The unit of conductance is

Question # 29

The SI unit of electric field intensity is

Question # 30

Ohm's law states that

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 Electric generators which convert mechanical energy into
A. solar energy
B. thermal energy
C. kinetic energy
D. electrical energy
2 If the resistance of 2 ohm and 4 ohm are connected in parallel, the equivalent resistance will be
A. 6 ohm
B. 4 ohm
C. zero ohm
D. 1.33 ohm
3 Heating effect caused by an electric circuit is written
A. H = I2Rt
B. H = I2R
C. H = IR2t
D. H = IR2
4 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
A. Zero
B. F/2
C. F
D. 2F
5 The conductivity of a superconductor is
A. Infinite
B. Very large
C. Very small
D. Zero
6 One coulomb per second is equal to
A. One volt
B. One ampere
C. One hom
D. One henry
7 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
8 The colour sequence in a carbon resistor in red, brown, orange and silver. The resistance of the resistor is
A. 21 x 103+ 10%
B. 23 x 101+ 10%
C. 21 x 103+ 5%
D. 12 x 103+ 5%
9 A 50 volt battery is connected across 10 ohm resistor. The current is 4.5 A. The internal resistance of the battery is
A. Zero
B. 0.5Ω
C. 1.1Ω
D. 5.0Ω
10 A condenser of capacity 50μF is charged to 10 V.The energy stored is
A. 1.25 x 10-3J
B. 3.75 x 10-3J
C. 2.5 x 10-3J
D. 5 x 10-3J

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