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What is the approximate resistance of a rheostat if the voltage...

This question belongs to Electrical Engineering Ohms Law
Ohms Law
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What is the approximate resistance of a rheostat if the voltage source is 18 V and the current is 220 mA?

Answer & Solution
Correct Answer: Option D
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1 Comment
Karan Hansda
Karan Hansda 7 years ago
First I=?
R=3.3M ohm
V=30V
So,
I = V/R
I = 30÷3.3 × 10^6
I =9.09 micro amp
SO, I= 9.O9 ~ 9 micro amps
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