What is the approximate resistance of a rheostat if the voltage source is 18 V a

Question

What is the approximate resistance of a rheostat if the voltage source is 18 V and the current is 220 mA?

Options:

A . 8.2 kΩ

B . 820 Ω

C . 8.2 Ω

D . 82 Ω

Answer: Option D

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