I. for current amplification.
II. for voltage stabilization.
III. for power amplification.
IV. as a switch.
A. I, II, III and IV
B. I, III, and IV only
C. I, II and III only
D. I, II and IV only
Correct Answer:
Option B = I, II and III only
Explanation
Transistor is used for amplification of current, power, and as a switch in logic gates.
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