Question

The transfer ratio of a transistor is 50. The input resistance of the transistor when used in common-emitter configuration is 1 $k\Omega$. The peak value of collector current for an A.C input voltage of 0.01 $V$ peak is

• A. $100\mu A$
• B. $0.01\mu A$
• C. $0.25\mu A$
• D. $500\mu A$

Answer 1

The correct option is D $500\mu A$

$\beta =50,R_i=1000\Omega ,V_i=0.01V\beta =\frac{i_c}{i_b}and{i}_b=\frac{V_i}{R_i}=\frac{0.01}{1000}={10}^{-5}AHence{i}_c=\beta \times i_b=50\times {10}^{-5}=500\mu A$