Question # 1

Resistance of a conductor depends upon

Choose an answer

the quantity of current passing through it

the voltage applied between its end

its dimensions, physical state and nature of its material

all of the above

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 material in the form of wire or rod or plate which leads the current into or cut of the electrolyte is known as

Choose an answer

voltmeters

resistance

electrode

current

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

A uniform resistance wire of Length L and diameter d has a resistance R. Another wire of same material has length, 4L and diameter 2d, the resistance will be

Choose an answer

2 R

R

R/2

R/4

Resistance of a conductor is increased, the currant will

Choose an answer

Decrease

Increase

Remain the same

None of these

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

Ohm established a relation between

Choose an answer

voltage and resistance

voltage and charge

voltage and current

voltage resistance and charge

For two resistance wires joined in parallel, the resultant resistance is 6/5 ohm. When one of the resistance wire breaks, the effective resistance becomes 2 ohm. The resistance of the broken wire is

Choose an answer

3/5 ohm

2 ohm

6/5 ohm

3 ohm

Electron volt is the unit of

Choose an answer

Potential difference

Energy

Resistance

Capacitance

The charge carriers in electrolyte are positive and negative

Choose an answer

protons

electrons

ions

none of these

Coulomb's force between two point charges depends upon

Choose an answer

Magnitude of charges

Distance between them

Medium in which they are located

All of the above

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

Choose an answer

0.1 watt

1 watt

10 watt

100 watt

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

Choose an answer

Ve

V/e

e/V

2Ve

The ratio of the gravitational force F_gto the electrostatic force F_ebetween two electrons at the same distance apart is approximately

Choose an answer

9.8

24 x 10¹⁹

24 x 10⁴²

24 x 10^-44

If 2.2 kilowatt power is transmitted through a 10 ohm line at 22000 volt, the power loss in the form of heat will be

Choose an answer

0.1 watt

1 watt

10 watt

100 watt

The graphical representation of ohm's law is

Choose an answer

hyperbola

straight line

ellipse

parabola

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?

Choose an answer

Zero

5μC m^-2

20μC m^-2

8μC m^-2

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

Choose an answer

positive temperature

negative temperature

absolute temperature

zero temperature

The capacitance of a parallel plate capacitor depends upon

Choose an answer

Area of the plates

Separation between the plates

Medium between the plates

All of the above

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

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?

Choose an answer

60 W bulb

100 W bulb

Both equally

None of these

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

Choose an answer

5

0.5

0.005

50

The concept of field theory was put forward by

Choose an answer

Franklin

Kepler

Oersted

Michael Faraday

The electric flux from a closed surface

Choose an answer

Is independent of the shape of the surface

Depends on the charge enclosed by the surface

Both a and b

None of the above

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

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

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

Choose an answer

Quantity of current

Distance from current

Both the quantity of current and distance from current element

None of the all

The force between two chares 0.06 m apart is 5 N. If each charge is moved towards the other by 0.01 m, then the force between them will become

Choose an answer

7.20 N

11.25 N

22.50 N

45.00

Solar cell converts sunlight directly into

Choose an answer

potential energy

thermal energy

mechanical energy

electrical energy

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

Choose an answer