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

Specific resistance of a wire depends upon

Question # 2

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 # 3

If we plot graph between potential difference (V) and current (I) obeying ohm's law, it will give us

Question # 4

Electron volt is the unit of.

Question # 5

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

Question # 6

The ohm's is defined as

Question # 7

In case of a parallel plate capacitor if the plate separation is doubled and plate area is halved, the capacitance becomes

Question # 8

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 # 9

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

Question # 10

If the resistance of 2 ohm and 4 ohm are connected in parallel, the equivalent resistance will be

Question # 11

Current provided by a battery is maximum when

Question # 12

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

Question # 13

106electrons are moving through a wire per second, the current developed is

Question # 14

A one microfarad capacitor of a TV is subjected to 4000 V potential difference. The energy stored in capacitor is

Question # 15

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

Question # 16

Three resistors of resistance R each are combined in various ways. Which of the following cannot be obtained?

Question # 17

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

Question # 18

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 # 19

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

Question # 20

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

Question # 21

Battery is charged in motor cars, which is based on

Question # 22

Capacitance of two or more capacitors

Question # 23

Electron volt is the unit of

Question # 24

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

Question # 25

When a dielectric material is introduced between the plates of a charged condenser the electric field between the plates

Question # 26

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

Question # 27

The minimum charge on any object can not be less than

Question # 28

The thermistors are usually made of

Question # 29

The speed of randomly moving electrons depends upon

Question # 30

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

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 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
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 The thermistors are usually made of
A. Metals with low temperature coefficient of resistivity
B. Metals with high temperature coefficient of resistivity
C. Metal oxides with high temperature coefficient of resistivity
D. Semi conducting materials having low temperature coefficient of resistivity
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 A one microfarad capacitor of a TV is subjected to 4000 V potential difference. The energy stored in capacitor is
A. 8 J
B. 16 J
C. 4 x 10-3J
D. 2 x 10-3J
6 The electric field intensity at a point due to a point charge
A. Falls off inversely as the distance
B. Falls off inversely as the square of distance
C. Remains unchanged with distance
D. Increase directly as square of distance
7 Equal charges are given to two spheres of different radii. The potential will
A. Be more on the smaller sphere
B. Be more on the bigger sphere
C. Be equal on both the sphere
D. Depend on the nature of the material of the sphere
8 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
9 The SI unit of permitivity is
A. Nm2C2
B. N-1m-2C2
C. NmC2
D. Nm2C-1
10 In case of a parallel plate capacitor if the plate separation is doubled and plate area is halved, the capacitance becomes
A. Four-fold
B. One-half
C. One-fourth
D. Zero

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