The current through a certain nonlinear device is at and at

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

Problem

The current through a certain nonlinear device is

8\,\text{mA}

at

0.64\,\text{V}

and

20\,\text{mA}

at

0.80\,\text{V}

. What is the ratio of its dynamic resistance at

0.64\,\text{V}

to that at

0.80\,\text{V}

? (a)

0.5

(b)

2.5

(c)

2.0

(d)

1.0

Related theory

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