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

The unit of intensity of electric field is

Question # 2

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

Question # 3

The potential difference across the conductors should be maintained constant by connecting the ends of wire to the terminal of a device called a source of

Question # 4

Electric generators which convert mechanical energy into

Question # 5

One coulomb of charge is created by

Question # 6

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

Question # 7

The statement "the electric force of repulsion or attraction between two point charges is directly proportional to the product of the charges and inversely proportional to square of the distance between them" refer to

Question # 8

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

Question # 9

The earth's potential is taken as

Question # 10

In a voltmeter the conduction takes place due to

Question # 11

The electrode connected with the positive terminal of the current source is called

Question # 12

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

Question # 13

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 # 14

The charge carriers in electrolyte are positive and negative

Question # 15

The electric intensity outside the two oppositely charged parallel metal plates is

Question # 16

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 # 17

The energy required to charge a capacitor of 5μF by connecting D.C. source of 20 KV is

Question # 18

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

Question # 19

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

Question # 20

Resistance of a conductor depends upon

Question # 21

The relation V = IR represents

Question # 22

The unit of conductance is

Question # 23

Current provided by a battery is maximum when

Question # 24

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

Question # 25

One joule is equal to

Question # 26

If the resistance of 2 ohm and 4 ohm are connected in parallel, the equivalent resistance will be

Question # 27

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 # 28

A closed surface contains two equal and opposite charges. The net electric flux from the surface will be

Question # 29

Three resistors of resistance 2,3 and 6 ohms are connected in parallel, their equivalent resistance is

Question # 30

The electric flux from a closed surface

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 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
2 Electric generators which convert mechanical energy into
A. solar energy
B. thermal energy
C. kinetic energy
D. electrical energy
3 The relation V = IR represents
A. Ampere law
B. Faraday's law
C. Ohm's law
D. Len's law
4 Specific resistance of a wire depends upon
A. Length
B. Cross-section area
C. Mass
D. None
5 The force of repulsion between two point charges is F, when these are at a distance 0.1 m apart. Now the point charges are replaced by sphere of radii 5 cm each having the same charge as that of the respective point charges. The distance between their centre is again kept 0.1 m ; then the force of repulsion will
A. Increase
B. Decrease
C. Remain F
D. Become 10F/9
6 Resistor is a device which convert electric energy to
A. Heat energy
B. Chemical energy
C. Elastic energy
D. All of the above
7 Coulomb force, when any material medium is placed between two charges
A. Increases
B. Decreases
C. Remain unchanged
D. None of these
8 Three resistance 500,500 and 50 ohms are connected in series across 555 volts mains. The current flowing through them will be
A. 0.52 A
B. 1 mA
C. 0.7 mA
D. 1.4 A
9 Surface density of charge is defined as
A. Charge per unit volume
B. Charge per unit length
C. Charge per unit area
D. Charge per unit mass
10 Ohm's law states that
A. The current through a resistor is directly proportional to the applied voltage
B. The voltage across a resistor is directly proportional to the current passing through it
C. Resistance is the constant of proportionality between the voltage and current
D. all of these

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