Two electric lamps with a resistance of 250 and 190 Ohm are connected in series to a 220V
| April 19, 2021 | education
Two electric lamps with a resistance of 250 and 190 Ohm are connected in series to a 220V network. Calculate the amperage in the lamps.
Total resistance for series connection of electric lamps:
R = R1 + R2, where R1 is the resistance of the first lamp (R1 = 250 Ohms), R2 is the resistance of the second lamp (R2 = 190 Ohms).
R = R1 + R2 = 250 + 190 = 440 ohms.
According to Ohm’s law for a section of the circuit:
I = U / R, where U is the total voltage (mains voltage, U = 220 V).
I = 220/440 = 0.5 A.
With a series connection, the current in electric lamps will be the same: I = I1 = I2 = 0.5 A.
Answer: The current in the lamps is 0.5 A.
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