An electric lamp is marked. It is used for hours. Calculate the total energy consumed by the lamp in .
Step 1: Given data
Potential difference,
Power,
Time,
Total energy consumed by the lamp,
Resistance of the lamp,
Current flowing through the lamp,
Step 2: Formula used
……………………(a)
……………………….(b)
………………(c)
Step 3: Calculation of the current flowing through the lamp
Substituting the given values in equation (a), we get
Substituting the value of resistance obtained above and the given value of the potential difference in equation (b), we get
……………………...(d)
Step 4: Calculation of the total energy consumed by the lamp
Using equation (d) and the given values in equation (c), we get
Hence, the total energy consumed by the lamp is equal to