Question

a torch bulb is rated 5 volt and 500 ma calculate its power resistance and energy consumed when it is lighted for two and half hours ​

Answer 1

Explanation:

Given:-

Potential Difference (V) = 5 volt

Current ( I ) = 500 mA = 0.5 A

Time ( t ) = 2.5 Hours = 9000 second

• Power P = V × I
• = 5 × 0.5 = 2.5 watt
• Resistance R = V / I
• = 5 / 0.5 = 10 ohm
• Energy E = P × t
• = 2.5 × 9000 = 22500 Joule