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

Cause of heat production in a current carrying conductor is

Question # 2

Two point charges A and B separated by a distance R attract each other with a force of 12 x 10-3N. The force between A and B when the charges on them are doubled and distance is halved

Question # 3

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 # 4

Which one of the following is the unit of electric field intensity

Question # 5

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 # 6

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

Question # 7

In a voltmeter the conduction takes place due to

Question # 8

In RC series circuit the time during which the capacitor acquires 0.63 times the equilibrium charge is called

Question # 9

If the length of the conductor is double and its cross sectional area is halved, its conductance will

Question # 10

One coulomb of charge is created by

Question # 11

The conventional current in a circuit is defined as " current which passes from a point at higher potential to a point at lower potential as if it represent a movement of

Question # 12

The concept of field theory was put forward by

Question # 13

The earth's potential is taken as

Question # 14

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

Question # 15

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 # 16

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

Question # 17

Solar cell converts sunlight directly into

Question # 18

Ohm's law states that

Question # 19

The unit of conductance is

Question # 20

Electron volt is the unit of

Question # 21

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

Question # 22

The unit of resistivity is

Question # 23

The colour sequence in a carbon resistor in red, brown, orange and silver. The resistance of the resistor is

Question # 24

The electrode connected with the positive terminal of the current source is called

Question # 25

One electron volt is equal to

Question # 26

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 # 27

Current provided by a battery is maximum when

Question # 28

In a charged capacitor the energy is stored in

Question # 29

Electric generators which convert mechanical energy into

Question # 30

The conductivity of a superconductor is

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 The conductivity of a superconductor is
A. Infinite
B. Very large
C. Very small
D. Zero
2 Ohm's law states that
A. The current through a resistor is directly proportional to the applied voltage
B. The voltage across a resistor is directly proportional to the current passing through it
C. Resistance is the constant of proportionality between the voltage and current
D. all of these
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 Specific resistance of a wire depends upon
A. Length
B. Cross-section area
C. Mass
D. None
5 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
A. Two
B. 1/2
C. Zero
D. 3/2
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 The electric flux is linked with a surface will be maximum when
A. The surface is held parallel to the electric field
B. The surface is held perpendicular to the electric field
C. The surface makes an angle of 45° with the electric field
D. All of the above
8 Two electric bulbs of 200 W and 100 W have same voltage. If R1and R2be their resistance respectively then
A. R1= 2R2
B. R2= 2R1
C. R2 = 4R1
D. R1= 4R2
9 In RC series circuit the time during which the capacitor acquires 0.63 times the equilibrium charge is called
A. Time constant
B. Decay constant
C. None of these
D. All of above
10 Resistor is a device which convert electric energy to
A. Heat energy
B. Chemical energy
C. Elastic energy
D. All of the above

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