A transistor is operated in common emitter configuration at constant collector voltage VC=1.5 V such that a change in the base current from 100 μ A to 150 μ A produces a change in the collector current from 5 mA to 10 mA. The current gain ( β ) is

Question

A transistor is operated in common emitter configuration at constant collector voltage VC=1.5 V such that a change in the base current from 100 μ A to 150 μ A produces a change in the collector current from 5 mA to 10 mA. The current gain ( β ) is (A) 67 (B) 75 (C) 100 (D) 50

Tardigrade Admin · Accepted Answer

AC current gain β is defined as the ratio of the collector to the base current at constant collector voltage, β =( (Δ iC/Δ iB) )Vc Given Δ iC=10 mA-5mA=5mA Δ iB=150 μ A-100μ A=50 μ A ∴ β =(5/50× 10-3)=100

Q. A transistor is operated in common emitter configuration at constant collector voltage $V_{C} = 1.5 V$ such that a change in the base current from 100 $μ A$ to 150 $μ A$ produces a change in the collector current from 5 mA to 10 mA. The current gain ( $β$ ) is

67

75

100

50

AC current gain $β$ is defined as the ratio of the collector to the base current at constant collector voltage, $β = (\frac{Δ i _{C}}{Δ i _{B}}) V_{c}$ Given $Δ i_{C} = 10 m A - 5 m A = 5 m A$ $Δ i_{B} = 150 μ A - 100 μ A = 50 μ A$ $∴$ $β = \frac{5}{50 \times 10 ^{- 3}} = 100$

Q. A transistor is operated in common emitter configuration at constant collector voltage VC​=1.5V such that a change in the base current from 100 μA to 150 μA produces a change in the collector current from 5 mA to 10 mA. The current gain ( β ) is

67

75

100

50

AC current gain β is defined as the ratio of the collector to the base current at constant collector voltage, β=(ΔiB​ΔiC​​)Vc​ Given ΔiC​=10mA−5mA=5mA ΔiB​=150μA−100μA=50μA ∴ β=50×10−35​=100

Q. A transistor is operated in common emitter configuration at constant collector voltage $V_{C} = 1.5 V$ such that a change in the base current from 100 $μ A$ to 150 $μ A$ produces a change in the collector current from 5 mA to 10 mA. The current gain ( $β$ ) is

AC current gain $β$ is defined as the ratio of the collector to the base current at constant collector voltage, $β = (\frac{Δ i _{C}}{Δ i _{B}}) V_{c}$ Given $Δ i_{C} = 10 m A - 5 m A = 5 m A$ $Δ i_{B} = 150 μ A - 100 μ A = 50 μ A$ $∴$ $β = \frac{5}{50 \times 10 ^{- 3}} = 100$