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

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

Question # 2

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

Question # 3

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

Question # 4

If a charged spherical conductor of radius 10 cm has potential V at a point distance 5 cm from its centre, then the potential at a point distance 15 cm from the centre will be

Question # 5

Resistance of a conductor is increased, the currant will

Question # 6

Magnetic effect at a point caused due to flow a current depend upon the

Question # 7

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

Question # 8

Thermocouple is an arrangement of two different metals

Question # 9

One coulomb per second is equal to

Question # 10

If we increase the distance between two plates of the capacitor, the capacitance will

Question # 11

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

Question # 12

An electric charge at rest is

Question # 13

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 # 14

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

Question # 15

A proton is about 1840 times heavier than an electron. When it is accelerated by a potential difference of 1 KV, its kinetic energy will be

Question # 16

Ohm is the unit of

Question # 17

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 # 18

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 # 19

Physicist George Simon ohm was a

Question # 20

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 # 21

The potential difference across each resistance in series combination is

Question # 22

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

Question # 23

Specific resistance of a wire depends upon

Question # 24

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

Question # 25

The resistance of the given conductor can be increased by

Question # 26

Surface density of charge is defined as

Question # 27

A ten ohm electric heater operates on a 110 V line. Calculate the rate at which it develops heat in watts

Question # 28

The unit of resistivity is

Question # 29

The thermistors are usually made of

Question # 30

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

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 A charge of 0.1 c accelerated through a potential difference of 1000V acquires kinetic energy
A. 200 J
B. 100 J
C. 1000 J
D. 400 J
2 One coulomb per second is equal to
A. One volt
B. One ampere
C. One hom
D. One henry
3 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
A. 5 volt
B. 3 volt
C. 15 volt
D. 9 volt
4 Free electrons are
A. tightly bound
B. fixed
C. loosely bound
D. tightly fixed
5 Physicist George Simon ohm was a
A. German physical
B. French physicist
C. Chinese physicist
D. Russian physicist
6 If one volt is needed to cause a current of one ampere to flow in a conductor, its resistance is
A. one ohm
B. one joule
C. one volt
D. one ampere
7 The speed of randomly moving electrons depends upon
A. pressure
B. volume
C. temperature
D. mass
8 A metal plate of thickness half the separation between the capacitor plates of capacitance C is inserted. The new capacitance is
A. C
B. C/2
C. Zero
D. 2C
9 Which one of the following is the unit of electric field intensity
A. JC-1
B. Vm-1
C. Cm-1
D. CJ-1
10 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
A. 10μF
B. 20μF
C. 30μF
D. 15μF

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