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CBSE Class 12-science Answered

How do we bias the junctions of a transistor in common emitter configuration?
Asked by Topperlearning User | 04 Jun, 2014, 13:23: PM
answered-by-expert Expert Answer

The emitter base junction is forward biased and collector is reversed biased.

Answered by | 04 Jun, 2014, 15:23: PM

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CBSE 12-science - Physics
How do we bias the junctions of a transistor in common emitter configuration?
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A P-N transistor is used in common - emitter mode in an amplifier circuit. A change of 40μA in the base current brings a change of 2mA in collector current and 0.04V in base  -emitter  voltage, Find (i) input resistance (ii) current amplification factor β. If a load resistance of 6 k oh m is used, then find voltage gain?
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CBSE 12-science - Physics
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Asked by Topperlearning User | 23 Jun, 2014, 14:16: PM
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CBSE 12-science - Physics
A transistor has a current gain of 30. If the collector resistance is 6kΩ, input resistance is 1kΩ, calculate its voltage gain?
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CBSE 12-science - Physics
The input resistance of a silicon transistor is Ω Its base current is changed by 15μ A, which results in the change in collector current by 2mA. This transistor is used as a common emitter amplifier with a load resistance of 5k Ω. Calculate current gain (βac) transconductance and voltage gain.
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The base of a transistor is lightly doped. Explain why?
Asked by Topperlearning User | 04 Jun, 2014, 13:23: PM
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CBSE 12-science - Physics
In the given figure, is (i) The emitter (ii) collector forward or reverse biased? Justify.
Asked by Topperlearning User | 04 Jun, 2014, 13:23: PM
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CBSE 12-science - Physics
Define current amplification factor in a common  emitter mode of transistor?
Asked by Topperlearning User | 23 Jun, 2014, 14:11: PM
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Calculate emitter current for which β = 100 IB = 20μA?
Asked by Topperlearning User | 10 Jul, 2014, 13:13: PM
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