The current passing through the lamp filament is 0.3 A
| September 26, 2021 | education
The current passing through the lamp filament is 0.3 A, the voltage across the lamp is 6 V. What is the electrical resistance of the lamp filament?
According to Ohm’s law, the current in the lamp filament will be directly proportional to the effective voltage across the lamp and inversely proportional to the electrical resistance of the lamp filament.
I = U / R, where I is the current (I = 0.3 A), U is the voltage (U = 6 V), R is the resistance (Ohm).
Let us express and calculate the resistance of the lamp filament:
R = U / I = 6 / 0.3 = 20 ohms.
Answer: The resistance of the lamp filament is 20 ohms.
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