Question

(b) When a 12 V battery is connected across an unknown resistor, there is a current of 2.5 mA in the circuit.
15. What is Ohm's law ? Explain how it is used to define the
difference and current.
Calculate the value of the resistance of the resistor.
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Answer 1

Explanation:

ohms law states that potential difference applied in the circuit and the current following in the circuit are directly proportional.

V = IR

b) V = 12v

I = 2.5 mA

= 0.0025 A

V = IR

R = V / I

R = 12 / 0.0025