devarshi-dt-logo

Question:

The transfer characteristic curve of a transistor, having input and output resistance 100Ω and 100kΩ respectively, is shown in the figure. The Voltage and Power gain, are respectively:

5×10⁴, 2.5×10⁶

5×10⁴, 5×10⁵

5×10⁴, 5×10⁶

2.5×10⁴, 2.5×10⁶

Solution:

Correct option is C. 5×10⁴, 2.5×10⁶
Vgain = (ΔIC/ΔIB)Rout/Rin = (5×10⁻³ / 100×10⁻⁶) × 10⁵ = 5×10⁴
Pgain = (ΔIC/ΔIB)(Vgain) = (5×10⁻³ / 100×10⁻⁶)(5×10⁴) = 2.5×10⁶