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

Which one of the following causes production of heat when current is set up in a wire?

Question # 2

The excess (equal in number) of electrons that must be placed on each of two small spheres spaced 3 cm apart, with force of repulsion between the spheres to be 10-19N, is

Question # 3

Which of the following represents an electric current?

Question # 4

One coulomb of charge is created by

Question # 5

The unit of intensity of electric field is

Question # 6

A sheet of aluminium foil of negligible thickness is introduced between the plates of a capacitor. The capacitance of the capacitor

Question # 7

The resistivity of a substance depends upon the

Question # 8

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

Question # 9

Thermocouple is an arrangement of two different metals

Question # 10

The charge carriers in gases are

Question # 11

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

Question # 12

The SI unit of conductivity is

Question # 13

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

Question # 14

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

Question # 15

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 # 16

The speed of randomly moving electrons depends upon

Question # 17

The value of electrical constant of proportionality k is

Question # 18

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

Question # 19

A heater coil rated at (1000 W - 200 V) is connected to 110 volt line. What will be the power consumed?

Question # 20

The thermistors are usually made of

Question # 21

Coulomb force, when any material medium is placed between two charges

Question # 22

The SI unit of capacitance is

Question # 23

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

Question # 24

Cause of heat production in a current carrying conductor 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 potential difference across each resistance in series combination is

Question # 27

The resistance of an incandescent lamp is

Question # 28

Surface density of charge is defined as

Question # 29

Potentiometer is more sensitive than voltmeter, because

Question # 30

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

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 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
2 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
3 The graphical representation of ohm's law is
A. hyperbola
B. straight line
C. ellipse
D. parabola
4 A point charge A of charge +4μC and another B of charge -1μC are placed in air at a distance 1 m apart. Then the distance of the point on the line joining the charge B, where the resultant electric field is zero, is (in m)
A. 2
B. 1
C. 0.5
D. 1.5
5 The unit of conductance is
A. ohm
B. meter
C. mho
D. ohm-meter
6 The electric flux from a closed surface
A. Is independent of the shape of the surface
B. Depends on the charge enclosed by the surface
C. Both a and b
D. None of the above
7 If 2.2 kilowatt power is transmitted through a 10 ohm line at 22000 volt, the power loss in the form of heat will be
A. 0.1 watt
B. 1 watt
C. 10 watt
D. 100 watt
8 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
9 Potentiometer is more sensitive than voltmeter, because
A. Voltmeter has a very high resistance
B. Voltmeter has a very low resistance
C. Potentiometer does not draw any current from a source of unknown potential difference
D. Potentiometer is sensitive
10 The fractional change in resistance per kelvin is known as
A. temperature coefficient
B. resistance coefficient
C. super temperature
D. critical temperature

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