Question # 1

Two conductors having the same type of charges are connected by a conducting wire. There would not be any amount of charges on them if

Choose an answer

They have the same potential

They have the same amount of charge

They have the same capacity

They have the same shape

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

Choose an answer

Electric potential at the surface of the cube is zero

Electric potential within the cube is zero

Electric filed is normal to the surface of the cube

Electric filed varies within the cube

Cause of heat production in a current carrying conductor is

Choose an answer

Collisions of free electrons with one another

High drift speed of free electrons

Collisions of free electrons with atoms or ions of conductor

High resistance value

A certain charge liberates 0.8 g of oxygen. The same charge will liberate. how many g of silver?

Choose an answer

108 g

10.8 g

0.8 g

108/0.8 g

The SI unit of current is

Choose an answer

watt

coulomb

volt

ampere

If the distance of separation between two chares is increased, the electrical potential energy of the system will

Choose an answer

Increase

Decrease

May increase or decrease

Remain the same

The charge per unit time through any cross-section of a conductor is called

Choose an answer

capacitance

electric power

current

potential difference

The SI unit of electric field intensity is

Choose an answer

CN^-1

NC^-1or Vm^-1

JC^-1

AV^-1

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

Choose an answer

10^-1A

10^-2A

10^-4A

1 mA

The ohm's is defined as

Choose an answer

1 ampere / 1 volts

1 coulomb / 1 volt

1 volt / 1 ampere

1 volt / 1 coulomb

If the length of the conductor is double and its cross sectional area is halved, its conductance will

Choose an answer

Increase four fold

Become one-fourth

Become one-half

Remains unchanged

The powers of tow electric bulbs are 100 W and 200 W. Both of them are joined with 220 V mains. The ratio of resistances of their filaments will be

Choose an answer

1 : 2

2 : 1

1 : 4

4 : 1

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

Choose an answer

-10 N

+10 N

+20 N

-20 N

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

Choose an answer

64 W

80 W

100 W

125 W

The SI unit of electric flux is

Choose an answer

Weber

Nm²C^-1

NmC^-1

Nm^-2C

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

Choose an answer

180 watt

10 watt

20 watt

60 watt

A capacitor of capacity 1μF is charged to 1 KV. The energy stored in J

Choose an answer

5

0.5

0.005

50

Solar cell converts sunlight directly into

Choose an answer

potential energy

thermal energy

mechanical energy

electrical energy

The relation V = IR represents

Choose an answer

Ampere law

Faraday's law

Ohm's law

Len's law

Surface density of charge is defined as

Choose an answer

Charge per unit volume

Charge per unit length

Charge per unit area

Charge per unit mass

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

Choose an answer

Electric potential

Electric flux

Electric field

Magnetic field

Thermocouple is an arrangement of two different metals

Choose an answer

To convert heat energy in to electrical energy

To produce more heat

To convert heat energy into chemical energy

To convert electric energy in to heat energy

A point charge Q is placed at the mid-point of a line joining two charges. 4q and q. if the net force on charge q is zero. then Q must be equal to

Choose an answer

-q

+q

-2q

+4q

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

Choose an answer

q = Q/4

q = Q/2

q = !

None of these

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

Choose an answer

10 KJ

5 KJ

2 KJ

1 KJ

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

Choose an answer

1/3 V

2/3 V

3/2 V

3V

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

Choose an answer

0.52 A

1 mA

0.7 mA

1.4 A

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

Choose an answer

One joule

One erg

One electron volt

None of these

A wire of radius r has resistance R. If it is stretched to a wire of r/2 radius, then the resistance becomes

Choose an answer

2R

4R

16R

Zero

More Classes

Other Links

Physics ECAT Pre Engineering Chapter 12 Electrostatics Online Test MCQs With Answers

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer