Question

if a bulb uses 100J energy and remains for one day.the cost of this bulb at ____5ruppees/unit​

Answer 1

Answer:

Bulb uses energy of 100J and remains on for 25 sec.

energy is used by bulb = 100J

time = 24 hrs = 24 *60*60 = 8640 sec

we know,

power consumed by bulb = energy used by bulb/time

= 100J/8640sec

= 4 watt

hence, power consumed by bulb is 4 watt.

Explanation: