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In Physics / High School | 2014-07-27

How many 176-ohm resistors are connected in series to achieve a current of 5 A with a 220 V battery?

Asked by Anonymous

Answer (2)

Total resistance = voltage / current = 220 / 5 = 44 ohms .
Even one 176-ohm resistor is too much. The current through it is 1.25 A, and more than one of them in series reduces the current even further.
Connecting them in parallel , however . . .
Four resistors of 176-ohms each, in parallel , have a net effective resistance of 176/4 = 44 ohms ... exactly what you need to do the job.

Answered by AL2006 | 2024-06-10

To achieve a current of 5 A with a 220 V battery, you need a total resistance of 44 ohms. Four 176-ohm resistors connected in parallel will give you this resistance. Connecting the resistors in series will not provide the correct resistance required to achieve the desired current.
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Answered by AL2006 | 2025-02-16

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