Determine the power of the current in an electric lamp connected to a 220 V network

univerkov | January 13, 2021 | education

Determine the power of the current in an electric lamp connected to a 220 V network, if it is known that the resistance of the filament of the lamp is 484 Ohm. What is the current flowing through the filament?

Given: U (voltage in the network to which the lamp is connected) = 220 V; R (lamp filament resistance) = 484 ohms.
1) Determine the current power in a given electric lamp: P = U ^ 2 / R = 220 ^ 2/484 = 100 W.
2) Let’s calculate the current that flows through the filament: I = U / R = 220/484 ≈ 0.455 A.
Answer: The current power is 100W; a current of 0.455 A flows through the circuit.

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