Question

Two electricbulb marked 1000W 220V and 200W 200v have tungsten filament of same length . Which of the two bulbs will have thicker filament?

Answer 1

Answer:The bulb of 1000 W

Explanation:

Resistance of 1000 W bulb, R= 220×220/1000 =48.4

Resistance of 200 W bulb, R = 200×200/200 = 200

Resistance of first bulb is smaller hence area of cross section is greater hence thicker