If collector current is 120 ~mA and base current is 2 ~mA and resistance gain is 3 , what is power gain?

Correct answer: (B) 10800. Current gain β=I_C/I_B=((120 ~mA))/((2 ~mA))=60 Power gain = Resistance gain × β^2 =(3) ×(60)^2=10800

Q134 / 180 · AIIMS 2007 · Physics

If collector current is \(120 \mathrm{~mA}\) and base current is \(2 \mathrm{~mA}\) and resistance gain is 3 , what is power gain?

A
180
Correct answer
B
10800
C
1.8
D
18

Solution

Current gain \(\beta=\frac{I_C}{I_B}=\frac{(120 \mathrm{~mA})}{(2 \mathrm{~mA})}=60\) Power gain \(=\) Resistance gain \(\times \beta^2\) \(=(3) \times(60)^2=10800\)

Hence, the correct answer is option: 'B'.

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