Four devices have the following current–voltage relations: P: Q: R: S: Which device…

PHYSICS · Single correct · CBSE · Physics · Current Electricity · Current Electricity

Problem

Four devices have the following current–voltage relations: P:

V = 4I

Q:

V = 3I + 2

R:

V = 5I^{2}

S:

I = V + 0.5V^{2}

Which device can be regarded as ohmic over the range tested? (a)

Q\text{ only}

(b)

P \text{ and } Q

(c)

P\text{ only}

(d)

R\text{ only}

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