How to Calculate Current Drawn by the Lamp Connected to a 220V Mains Supply?
What is the current taken by the lamp when it is connected to a 220V mains supply?
Given parameters: Potential difference (V) = 220 V Power of lamp 1 (P1) = 100 W Power of lamp 2 (P2) = 60 W Both the bulbs are connected in parallel. Therefore, the potential difference across each of them will be 220 V, because no division of voltage occurs in a parallel circuit.
What is the resistance of the lamp?
What is the resistance of the lamp?
Answer:
Given parameters: Potential difference (V) = 220 V Power of lamp 1 (P1) = 100 W Power of lamp 2 (P2) = 60 W Both the bulbs are connected in parallel. Therefore, the potential difference across each of them will be 220 V, because no division of voltage occurs in a parallel circuit.
To calculate the current drawn by the lamp connected to a 220V mains supply, we can use the formula: Power = Voltage x Current I = P/V For lamp 1: I1 = P1/V I1 = 100/220 I1 = 5/11 A For lamp 2: I2 = P2/V I2 = 60/220 I2 = 3/11 A Since both lamps are connected in parallel, the net current drawn from the line is the sum of the currents drawn by each lamp: I = I1 + I2 I = 5/11 + 3/11 I = 8/11 I = 0.7273 A Therefore, the current drawn by the lamp connected to a 220V mains supply is 0.727 A.