Question

Q1. four resistances of 16 ohms each are connected in parallel.four such combinations are connected in series . what is the total resistance? Q2.which has greater resistance,100 watt bulb or a 60 watt bulb?how?. Q3. an electric bulb is rated at 220v and 100 watt.what is its resistance?

Answer 1

Ans.1
Total Resistance,
For one combination,
1/P=1/16*4
1/P=1/4
P=4ohm
For four combinations,
S=4*4=16ohm
Net Resistance=16ohm.