Verified Solution • 2025–26 Session moderate

QNEET-2013-Ph-1498: NEET 2013 Physics - Class 12 NEET-2013-Ph-1498 Solution: In a common emitter (CE) amplifier having a voltage gain G the…

In a common emitter (CE) amplifier having a voltage gain G the transistor used has transconductance 0.03 mho and current gain 25. If the above transistor is replaced with another one with transconductance 0.02 mho and current gain 20 the voltage gain will be 13G\frac{1}{3}G 54G\frac{5}{4}G 23G\frac{2}{3}G 1.5G

Multiple Choice Options

  • A 13G{1 \over 3}G 3 1 _ G
  • B 54G{5 \over 4}G 4 5 _ G
  • C 23G{2 \over 3}G 3 2 _ G
  • D 1.5G

Step-by-Step Verified Solution

Formula for trans conductance g m is g m = _ r i Formula for voltage gain A, A = _ R L r i _ A = g m R L Given A = G _ G = g m R L _ G _ g m _ G 2 G 1 = g m 2 g m 1 _ G 2 = 0.02 0.03 _ G = 2 3 G

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