The ratio (R) of output resistance r0, and the input resistance ri in… | JEE Main 2016 (10 Apr, Shift 1)

Q97JEE Main 2016 · 10 APR · SHIFT 1Medium

Junction Transistor

The ratio (R) of output resistance r0, and the input resistance ri in measurements of input and output characteristics of a transistor is typically in the range:

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Answer: (b)

Input resistance $r_i = \Delta V_{BE}/\Delta I_B$ (from input characteristics) is of the order of a few hundred ohm to about 1 k $\Omega$ .
Output resistance $r_o = \Delta V_{CE}/\Delta I_C$ (from the flat part of output characteristics) is much larger.
The answer key takes the typical ratio $R = r_o/r_i$ to be in the range 1 to 10.
So the answer (as per key) is (b) $R \sim 1 - 10$ .

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Junction Transistor question from JEE Main 2016 (10 Apr, Shift 1)

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