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

An electric charge at rest is

Question # 2

Which of the following represents an electric current?

Question # 3

One joule is equal to

Question # 4

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 # 5

The SI unit of electric flux is

Question # 6

The nature of capacity of electrostatic capacitor depends on

Question # 7

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

Question # 8

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

Question # 9

A (100 W , 200 W) bulb is connected to a 160 V power supply. The power consumption would be

Question # 10

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

Question # 11

One coulomb per second is equal to

Question # 12

An alpha particle is accelerated through a potential difference of 106volt. Its kinetic energy will be

Question # 13

Physicist George Simon ohm was a

Question # 14

The material in the form of wire or rod or plate which leads the current into or cut of the electrolyte is known as

Question # 15

One moving a charge of 20 coulombs by 2 cm, 2 J of work is done, then the potential difference between the points is

Question # 16

The charge carriers in gases are

Question # 17

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

Question # 18

The SI unit of capacitance is

Question # 19

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

Question # 20

If electric and gravitational force on an electron in a uniform electric field will be

Question # 21

A 100 W, 200 V bulb is connected to a 160 volts supply. The actual power consumption would be

Question # 22

A parallel plate capacitor is first charged and then a dielectric slab is introduced between the plates. The quantity that remains unchanged is

Question # 23

The minimum charge on any object can not be less than

Question # 24

The resistance of the given conductor can be increased by

Question # 25

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 # 26

The conductivity of a superconductor is

Question # 27

The speed of randomly moving electrons depends upon

Question # 28

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

Question # 29

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 # 30

The electric flux from a closed surface

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 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
2 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
A. -q
B. +q
C. -2q
D. +4q
3 Consider a spherical shell of metal at he centre of which a positive point charge is kept
A. The electric filed is zero outside the shell
B. The electric field is zero everywhere
C. The electric field is zero in the region inside the shell
D. The electric field is non-zero in both regions outside and inside the shell
4 A current of 1.6 A is passed through a solution of CuSO4. How many Cu2+ions are liberated in one minute?
A. 3 x 1020
B. 3 x 1010
C. 6 x 1020
D. 6 x 1010
5 The potential difference across each resistance in series combination is
A. same
B. different
C. zero
D. none of these
6 The powers of tow electric bulbs are 100 W and 200 W. Both of them are joined with 220 V mains. The ratio of resistances of their filaments will be
A. 1 : 2
B. 2 : 1
C. 1 : 4
D. 4 : 1
7 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
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 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
A. negative charges
B. positive charges
C. protons
D. electrons
10 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
A. -10 N
B. +10 N
C. +20 N
D. -20 N

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