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>>Class 12
>>Physics
>>Semiconductor Electronics: Materials, Devices and Simple Circuits
>>V-I Characteristics of a P-N Junction Diode
>> $The V - i graph for a conductor makes an$

Question

The $V - i$ graph for a conductor makes an angle $θ$ with $V - a x i s$ . Here $V$ denotes the voltage and $i$ denotes current. The resistance of conductor is given by

A

$s i n θ$

B

$c o s θ$

C

$t a n θ$

D

$c o t θ$

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Solution

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Correct option is D)

From ohm's law $R = \frac{V}{i}$
also the slope of V-i Graph $S = \frac{V}{i}$
angle with y axis is given by $tan θ = \frac{I}{V}$
so $R = S = \frac{1}{tan θ} = cot θ$

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