Correct Answer - Option 2 : 19
Concept:
Transistor:
A semiconductor device made of semiconductor material with at least three terminals for connection to an external circuit.
- It is made by sandwiching one type of semiconductors between two and used for amplification and switching purposes in electronic devices.
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Alpha gain (α): In the common-base configuration, the current gain that is defined as the ratio of change in collector current to change in emitter current is known as alpha gain.
\(\alpha=\frac{I_c}{I_e}\) -- (1)
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Beta gain (β): It is the current gain in the common Emitter configuration. the current gain that is defined as the change in collector current to base current is known as beta gain.
\(β=\frac{I_c}{I_b}\) -- (2)
- The relation between alpha gain and beta gain is given by:
\(α = \frac{β}{1+β}\) -- (3)
Calculation:
Given α = 0.95
\(\implies 0.95 = \frac{β}{1+β}\)
⇒ 0.95 + 0.95 β = β
⇒ 0.95 = 0.05 β
\(\implies \beta = \frac{0.95}{0.05} = 19\)
So, the correct option is 19.
