ECAT Pre General Science Physics Chapter 12 MCQ Test With Answer

MCQ's Test For ECAT Pre General Science Physics Chapter 12 Electrostatics

Try The MCQ's Test For ECAT Pre General Science Physics Chapter 12 Electrostatics

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ECAT Pre General Science Physics Chapter 12 Electrostatics

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Question # 1

The speed of randomly moving electrons depends upon

Question # 2

The resistance of a conductor does not depend on its

Question # 3

The nature of capacity of electrostatic capacitor depends on

Question # 4

The unit of intensity of electric field is

Question # 5

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

Question # 6

The concept of field theory was put forward by

Question # 7

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

Question # 8

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

Question # 9

In a charged capacitor the energy is stored in

Question # 10

When three identical bulbs of 60 watt, 200 volt rating are connected in series to a 200 volt supply, the power drawn by them will be

Question # 11

Electric generators which convert mechanical energy into

Question # 12

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 # 13

Resistance of a conductor depends upon

Question # 14

If we plot graph between potential difference (V) and current (I) obeying ohm's law, it will give us

Question # 15

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 # 16

Which one of the following has larger value of relative permitivity Erat room temperature?

Question # 17

A capacitor is charged with a battery and then it is disconnected. A slab of dielectric is now inserted between the plates, then

Question # 18

Taking the earth to be a spherical conductor of diameter 12.8 x 103km. Its capacity will be

Question # 19

A cube of metal is given a positive charge Q. For the above system, which of the following statements is true?

Question # 20

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

Question # 21

When an electron is accelerated through a P.D. of an one volt, it will acquire energy equal to

Question # 22

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

Question # 23

The colour sequence in a carbon resistor in red, brown, orange and silver. The resistance of the resistor is

Question # 24

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

Question # 25

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

Question # 26

Thermocouple is an arrangement of two different metals

Question # 27

The resistance of an incandescent lamp is

Question # 28

Specific resistance of a wire depends upon

Question # 29

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

Question # 30

The value of electrical constant of proportionality k is

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 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
2 A conducting wire is drawn to double its length. Final resistivity of the material will be
A. Double of the original one
B. Half of the original one
C. One fourth of the original one
D. Same as original one
3 The electric flux is linked with a surface will be maximum when
A. The surface is held parallel to the electric field
B. The surface is held perpendicular to the electric field
C. The surface makes an angle of 45° with the electric field
D. All of the above
4 A 50 volt battery is connected across 10 ohm resistor. The current is 4.5 A. The internal resistance of the battery is
A. Zero
B. 0.5Ω
C. 1.1Ω
D. 5.0Ω
5 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
6 The SI unit of permitivity is
A. Nm2C2
B. N-1m-2C2
C. NmC2
D. Nm2C-1
7 Electron volt is the unit of
A. Potential difference
B. Energy
C. Resistance
D. Capacitance
8 One joule is equal to
A. 1.6 x 1019eV
B. 6.25 x 1018eV
C. 1.6 x 1818eV
D. 6.25 x 1019eV
9 Heating effect caused by an electric circuit is written
A. H = I2Rt
B. H = I2R
C. H = IR2t
D. H = IR2
10 The speed of randomly moving electrons depends upon
A. pressure
B. volume
C. temperature
D. mass

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