At a voltage of 220 V, the current in the filament of the incandescent lamp is 500 mA.
| August 10, 2021 | education
At a voltage of 220 V, the current in the filament of the incandescent lamp is 500 mA. Determine the resistance of the coil
To determine the coil resistance of a given incandescent lamp, apply Ohm’s law: R = U / I.
Variable values: U – operating voltage on the spiral (U = 220 V); I – current strength (I = 500 mA = 0.5 A).
Let’s make a calculation: R = U / I = 220 / 0.5 = 440 Ohm.
Answer: The resistance of the coil is 440 ohms.
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