A resistor, a resistor and an unknown resistor are connected in series across a…

PHYSICS · Subjective · A Level · Physics · Electricity · Electricity

Problem

A

5\,\Omega

resistor, a

10\,\Omega

resistor and an unknown resistor

R

are connected in series across a

30\,\text{V}

supply. If the potential difference across

R

is measured to be

12\,\text{V}

, determine the value of

R

.

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