Three identical lamps each power 100W are connected in parallel across a potential difference of 250V. Calculate the current in the circuit
Question 1 Report
Three identical lamps each power 100W are connected in parallel across a potential difference of 250V. Calculate the current in the circuit
Answer Details
When lamps are connected in parallel, each lamp has the same voltage across it. Therefore, the potential difference across each of the three lamps is 250V.
The power of each lamp is given as 100W. We know that power (P) is equal to voltage (V) multiplied by current (I), i.e., P = VI. Therefore, the current through each lamp can be calculated as I = P/V = 100/250 = 0.4 A.
Since the lamps are connected in parallel, the total current in the circuit is the sum of the currents through each lamp. Hence, the total current in the circuit is 3 times the current through one lamp, which is 3 x 0.4 A = 1.2 A.
Therefore, the correct option is 1.2A.
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