Question:
In a transistor, doping level in base is increased slightly, the collector current and base current respectively
In a transistor, doping level in base is increased slightly, the collector current and base current respectively
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Higher base doping increases recombination, reducing collector current but increasing base current.
Updated On: Feb 4, 2026
- increases slightly, decreases slightly
- decreases slightly, increases slightly
- increases slightly, increases slightly
- decreases slightly, decreases slightly
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The Correct Option is B
Solution and Explanation
Step 1: Understand the role of base doping.
The base region of a transistor is lightly doped to allow maximum charge carriers to pass into the collector region.
Step 2: Effect of increased base doping.
When base doping is increased slightly, recombination of charge carriers in the base increases.
Step 3: Effect on collector current.
Due to increased recombination, fewer charge carriers reach the collector, hence collector current decreases slightly.
Step 4: Effect on base current.
Increased recombination requires more carriers to be supplied to the base, so base current increases slightly.
The base region of a transistor is lightly doped to allow maximum charge carriers to pass into the collector region.
Step 2: Effect of increased base doping.
When base doping is increased slightly, recombination of charge carriers in the base increases.
Step 3: Effect on collector current.
Due to increased recombination, fewer charge carriers reach the collector, hence collector current decreases slightly.
Step 4: Effect on base current.
Increased recombination requires more carriers to be supplied to the base, so base current increases slightly.
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