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

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

Question # 2

Resistance of a conductor is increased, the currant will

Question # 3

The energy required to charge a capacitor of 5μF by connecting D.C. source of 20 KV is

Question # 4

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

Question # 5

Two electric bulbs of 200 W and 100 W have same voltage. If R1and R2be their resistance respectively then

Question # 6

A charge of 0.1 c accelerated through a potential difference of 1000V acquires kinetic energy

Question # 7

What is the current is a 2 x 106ohm resistor having a potential difference of 2 x 103volts?

Question # 8

The resistance of an incandescent lamp is

Question # 9

One joule is equal to

Question # 10

The resistance of the given conductor can be increased by

Question # 11

The nature of capacity of electrostatic capacitor depends on

Question # 12

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 # 13

A current of 1.6 A is passed through a solution of CuSO4. How many Cu2+ions are liberated in one minute?

Question # 14

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

Question # 15

A wire of radius r has resistance R. If it is stretched to a wire of r/2 radius, then the resistance becomes

Question # 16

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

Question # 17

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

Question # 18

The fractional change in resistance per kelvin is known as

Question # 19

Heating effect caused by an electric circuit is written

Question # 20

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

Question # 21

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 # 22

If the distance of separation between two chares is increased, the electrical potential energy of the system will

Question # 23

The value of electrical constant of proportionality k is

Question # 24

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

Question # 25

Ohm established a relation between

Question # 26

The earth's potential is taken as

Question # 27

The capacitance of a parallel plate capacitor depends upon

Question # 28

The energy stored in a charge capacitor

Question # 29

Two point charge +3μC and +8μC repel each other with a force of 40 N. If a charge of -5μC is added to each of them, then the force between then will become

Question # 30

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

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ECAT Class Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 The relation V = IR represents
A. Ampere law
B. Faraday's law
C. Ohm's law
D. Len's law
2 Coulomb force, when any material medium is placed between two charges
A. Increases
B. Decreases
C. Remain unchanged
D. None of these
3 An alpha particle is accelerated through a potential difference of 106volt. Its kinetic energy will be
A. 1 MeV
B. 2 MeV
C. 4 MeV
D. 8 MeV
4 106electrons are moving through a wire per second, the current developed is
A. 1.6 x 10-19
B. 1 A
C. 1.6 x 10-15 A
D. 106A
5 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
A. 3.9
B. 4
C. 4.2
D. 6
6 A wire of radius r has resistance R. If it is stretched to a wire of r/2 radius, then the resistance becomes
A. 2R
B. 4R
C. 16R
D. Zero
7 The electric intensity at infinite distance from the point charge will be
A. Infinite
B. Positive
C. Zero
D. Negative
8 Calculate the amount of charge flowing in 2 minutes in a wire of resistance 10Ωwhen a potential difference of 20 V is applied between its ends
A. 120 C
B. 240 C
C. 20 C
D. 4 C
9 Cause of heat production in a current carrying conductor is
A. Collisions of free electrons with one another
B. High drift speed of free electrons
C. Collisions of free electrons with atoms or ions of conductor
D. High resistance value
10 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

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