SI unit of resistance is

(a)

mho

(b)

joule

(c)

ohm

(d)

ohm meter

Kilowatt hour is the unit of

(a)

resistivity

(b)

conductivity

(c)

electrical energy

(d)

electrical power

When will be the current flow in a circuit?

(a)

A switch is closed

(b)

A switch is opened

(c)

Switch is either open or closed

(d)

None of the above

A parallel circuit consist of three resistors with values of 430, 210 and 100. The total resistance is

(a)

0.017 ohm

(b)

58.82 ohm

(c)

58.82 kilo ohm

(d)

None of the above

The resistance of material depends on.

(a)

Temperature

(b)

Length of conductor

(c)

Area of cross-section

(d)

All the above

Give the name of components which is designed to oppose the flow of current.

(a)

Capacitor

(b)

Resistors

(c)

Fuse wire

(d)

Inductor

Kilowatt - hour is the unit of

(a)

Power

(b)

Potential difference

(c)

Force

(d)

Electrical energy

Why battery is used in the circuit?

(a)

Measure Current

(b)

Maintain a potential difference

(c)

Oppose the current

(d)

Measure potential

If two unequal resistors connected in parallel then.

(a)

The voltage is same in both resistor

(b)

The current is same in both resistor

(c)

The voltage is larger in one of the resistor

(d)

The current is large in one of the resistor

In parallel combination, resistance decrease due to increase in

(a)

Area of cross section

(b)

Voltage

(c)

Length

(d)

Current

Why are copper wires used as connecting wires?

(a)

Low resistivity

(b)

Low conductivity

(c)

High Resistivity

(d)

Both A and B

Which of following relation is correct for voltage, work done and charge?

(a)

V = W x Q

(b)

W = V x Q

(c)

V = Q 1W

(d)

W = V / Q

Electric iron box and electric heater works on the principle of

(a)

heating effect of current

(b)

heating effect of voltage

(c)

heating effect of power

(d)

heating effect of emf

A 110 W, 220 V bulb draws a current.

(a)

2 A

(b)

440 A

(c)

0.5 A

(d)

5.5 A

The electric current in a closed circuit always flows from the ________ terminal of the electric cell to ___________ terminal.

(a)

-ve to +ve

(b)

+ve to -ve

(c)

+ve to +ve

(d)

none