An electronic sensor requires a steady current of when powered by a source

PHYSICS · Single correct · A Level · Physics · Electricity · Electricity

Problem

An electronic sensor requires a steady current of

5.0\,\text{mA}

when powered by a

9.0\,\text{V}

source. To achieve this, what resistance should be placed in series with the sensor? (a)

180\,\Omega

(b)

1.8\times10^{4}\,\Omega

(c)

1.8\,\text{k}\Omega

(d)

900\,\Omega

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