A 20 ohms resistor is powered by a 3 V battery. How much current flows?

Question

A. 0.15 A

B. 6.7 A

C. 7 A

D. 60 A

Answer 1

According to Ohm's law:

Voltage (V) applied across any resistance is directly proportional to the current (I) flowing through it.

V ∝ I

V = I R, where R is the resistance of the resistor. Voltage is in Volts, resistance is ohm and current in Ampere.

3 = I * 20

I = 0.15 Ampere

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