If p.d of 240 volt us applied across a lamp and produces an energy of 60 watt what is the value of the current . And calculate the resistance in the filament
To find the current passing through the lamp, we can use the formula:
Power = Voltage x Current
Given that the power (P) is 60 watts and the voltage (V) is 240 volts, we can rearrange the formula to solve for the current (I):
60 = 240 x I
I = 60 / 240
I = 0.25 A
Therefore, the current passing through the lamp is 0.25 amperes.
To calculate the resistance in the filament, we can use Ohm's Law:
Resistance = Voltage / Current
Given that the voltage (V) is 240 volts and the current (I) is 0.25 amperes, we can calculate the resistance (R):
R = 240 / 0.25
R = 960 ohms
Therefore, the resistance in the filament of the lamp is 960 ohms.