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

In a charged capacitor the energy is stored in

Question # 2

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 # 3

Ohm's law states that

Question # 4

The ratio of the gravitational force Fgto the electrostatic force Febetween two electrons at the same distance apart is approximately

Question # 5

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

Question # 6

What is the current is a 2 x 106ohm resistor having a potential difference of 2 x 103volts?

Question # 7

In a voltmeter the conduction takes place due to

Question # 8

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

Question # 9

Heating effect caused by an electric circuit is written

Question # 10

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 # 11

Ohm established a relation between

Question # 12

The SI unit of electric field intensity is

Question # 13

The fractional change in resistance per kelvin is known as

Question # 14

Resistance of a conductor depends upon

Question # 15

The resistivity of a substance depends upon the

Question # 16

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

Question # 17

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 # 18

The SI unit of electric flux is

Question # 19

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

Question # 20

The dot product of electric field intensity E and vector area A is called

Question # 21

The graphical representation of ohm's law is

Question # 22

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

Question # 23

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

Question # 24

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

Question # 25

The potential difference across each resistance in series combination is

Question # 26

One coulomb per second is equal to

Question # 27

If two bulbs one of 60 W and other of 100 W are connected in parallel, then which one of the following will flow more?

Question # 28

The earth's potential is taken as

Question # 29

A metal plate of thickness half the separation between the capacitor plates of capacitance C is inserted. The new capacitance is

Question # 30

A hollow insulated conduction sphere is given a positive charge of 10μC. What will be the electric field at the centre of the sphere if its radius is 2 meters?

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 Ohm established a relation between
A. voltage and resistance
B. voltage and charge
C. voltage and current
D. voltage resistance and charge
2 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
3 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
4 In a building, there are 15 bulbs of 40 watts, 5 bulbs of 100 watts, 5 fans of 80 watts and a heater of 1 kilowatt. The voltage of the electric main is 220 volts. The minimum efficiency of the main fuse of the building will be
A. 0.4 A
B. 11.4 A
C. 9.8 A
D. 10.6 A
5 An electron of charge e coulomb passes through a potential difference of V volts its energy in joules will be
A. V/e
B. eV
C. e/V
D. V
6 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
7 What is the current is a 2 x 106ohm resistor having a potential difference of 2 x 103volts?
A. 10-1A
B. 10-2A
C. 10-4A
D. 1 mA
8 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
A. 3.9
B. 4
C. 4.2
D. 6
9 Electron volt is the unit of
A. Potential difference
B. Energy
C. Resistance
D. Capacitance
10 The substances whose resistance decreases with the increase in temperature these substances have coefficient of
A. positive temperature
B. negative temperature
C. absolute temperature
D. zero temperature

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