For a common emitter amplifier, the audio signal voltage across the collector resistance 2 kΩ is 2 V . If the current amplification factor of the transistor is 200 , and the base resistance is 1.5 kΩ , the input signal voltage and base current is

Question

For a common emitter amplifier, the audio signal voltage across the collector resistance 2 kΩ is 2 V . If the current amplification factor of the transistor is 200 , and the base resistance is 1.5 kΩ , the input signal voltage and base current is (A) 0.15V and 10μA (B) 1.015V and 1A (C) 0.0015V and 1mA (D) 0.0075V and 5μA

Tardigrade Admin · Accepted Answer

The collector current IC=β Ib=(2/2 × 103) IC=1× 10- 3A The base current Ib=(10- 3/200) Ib=5× 10- 6A A Ib=5μ A and VB=IbRi=5μ A× 1.5kΩ =0.0075V

Q. For a common emitter amplifier, the audio signal voltage across the collector resistance $2 k Ω$ is $2 V$ . If the current amplification factor of the transistor is $200$ , and the base resistance is $1.5 k Ω$ , the input signal voltage and base current is

$0.15 V$ and $10 μ A$

$1.015 V$ and $1 A$

$0.0015 V$ and $1 m A$

$0.0075 V$ and $5 μ A$

The collector current
$I_{C} = β I_{b} = \frac{2}{2 \times 1 0 ^{3}}$
$I_{C} = 1 \times 1 0^{- 3} A$
The base current
$I_{b} = \frac{1 0 ^{- 3}}{200}$
$I_{b} = 5 \times 1 0^{- 6} A$ A
$I_{b} = 5 μ A$ and $V_{B} = I_{b} R_{i} = 5 μ A \times 1.5 k Ω$ $= 0.0075 V$

Q. For a common emitter amplifier, the audio signal voltage across the collector resistance 2kΩ is 2V . If the current amplification factor of the transistor is 200 , and the base resistance is 1.5kΩ , the input signal voltage and base current is

0.15V and 10μA

1.015V and 1A

0.0015V and 1mA

0.0075V and 5μA