An electric lamp marked 240v, 60 W is left to operate for an hour. How much energy is generated by the filament?
Answer Details
The energy generated by the filament can be calculated using the formula:
Energy = Power x Time
where Power is the electric power of the lamp in Watts, and Time is the duration in seconds.
First, we need to convert the electric power of the lamp from Watts to Joules per second (J/s). We know that 1 Watt = 1 Joule per second, so:
60 W = 60 J/s
Next, we need to convert the duration from hours to seconds. We know that 1 hour = 3600 seconds, so:
1 hour = 3600 s
Now we can calculate the energy generated by the filament:
Energy = Power x Time
Energy = 60 J/s x 3600 s
Energy = 216000 J
Therefore, the energy generated by the filament is 2.16 x 10^5 J (option D).