Question 10

How many 176 Ω resistors (in parallel) are required to carry 5 A on a 220 V line?

Answer

For x number of resistors of resistance 176 Ω, the equivalent resistance of the resistors connected in parallel is given by Ohm’s law as

Where,

Supply voltage, V = 220 V

Current, I = 5 A

Equivalent resistance of the combination = R, given as

From Ohm’s law,

Therefore, four resistors of 176 Ω are required to draw the given amount of current.

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