A toaster operating at 240 V has a resistance of 120 Ω. The power is ______.

(a)

400 W

(b)

2 W

(c)

480 W

(d)

240 W

A carbon resistor of (47 ± 4.7 ) k Ω to be marked with rings of different colours for its identification. The colour code sequence will be ______.

(a)

Yellow – Green – Violet – Gold

(b)

Yellow – Violet – Orange – Silver

(c)

Violet – Yellow – Orange – Silver

(d)

Green – Orange – Violet - Gold

When 'n' resistors of equal resistance (R) are connected in series and in parallel respectively, then the ratio of their effective resistance is ______________

(a)

1: n²

(b)

n²: 1

(c)

n: 1

(d)

1: n

Which of the following has negative temperature coefficient of resistance?

(a)

copper

(b)

tungsten

(c)

carbon

(d)

silver

The temperature co-efficient of resistance for alloys is _____________.

(a)

low

(b)

very low

(c)

high

(d)

very high

Electrical Lamp

(1)

ohm

Current

(2)

watt

Resistance

(3)

Tungsten

Power

(4)

ampere

Energy

(5)

joule