ECAT Pre Computer Science Chapter 12 MCQ Test With Answer

MCQ's Test For ECAT Physics Chapter 12 Electrostatics

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ECAT Physics Chapter 12 Electrostatics

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Question # 1

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 # 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

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

Question # 4

The electric field will be uniform

Question # 5

The electric flux is linked with a surface will be maximum when

Question # 6

A one microfarad capacitor of a TV is subjected to 4000 V potential difference. The energy stored in capacitor is

Question # 7

Three resistance 500,500 and 50 ohms are connected in series across 555 volts mains. The current flowing through them will be

Question # 8

The electric field due to an infinite long thin wire at a distance R varies as

Question # 9

The graphical representation of ohm's law is

Question # 10

The minimum charge on any object can not be less than

Question # 11

The energy stored in a charge capacitor

Question # 12

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

Question # 13

Coulomb's force between two point charges depends upon

Question # 14

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

Question # 15

Current provided by a battery is maximum when

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 The unit of resistance is
A. volt
B. ampere
C. ohm
D. coat
2 The conductivity of a superconductor is
A. Infinite
B. Very large
C. Very small
D. Zero
3 The speed of randomly moving electrons depends upon
A. pressure
B. volume
C. temperature
D. mass
4 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
5 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
6 The concept of field theory was put forward by
A. Franklin
B. Kepler
C. Oersted
D. Michael Faraday
7 If 2.2 kilowatt power is transmitted through 1 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 dot product of electric field intensity E and vector area A is called
A. Electric potential
B. Electric flux
C. Electric field
D. Magnetic field
9 The minimum resistance that can be obtained by connecting 5 resistance of 1/4Ωeach is
A. 4/5Ω
B. 5/4Ω
C. 20Ω
D. 0.05 Ω
10 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
A. 1/3 V
B. 2/3 V
C. 3/2 V
D. 3V

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