For the given transistor amplifier circuit in CE configuration, V(CC) = 1 V, R(C) = 1 kΩ, R(B) = 100 kΩ and β = 100. The value of base current I(B) is: Image
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Question

For the given transistor amplifier circuit in CE configuration, V(CC) = 1 V, R(C) = 1 kΩ, R(B) = 100 kΩ and β = 100. The value of base current I(B) is: Image

G1 Physics · Accepted Answer

From the circuit, the collector current is set by the collector branch. Using the source values: V(CC) = 1 V R(C) = 1 kΩ So the collector current is I(C) = V(CC)/R(C) = 1/1000 = 1 mA For a transistor, β = I(C)/I(B) Therefore, I(B) = I(C)/β = 1 mA / 100 = 0.01 mA = 10 μA Hence option B follows.