Question:
In a semiconductor, conductivity can be increased by
In a semiconductor, conductivity can be increased by
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Doping increases conductivity of semiconductors by increasing free charge carriers.
Updated On: May 7, 2026
- Cooling it to a very low temperature
- Applying a strong magnetic field
- Doping with impurities
- Removing free electrons
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The Correct Option is C
Solution and Explanation
Concept:
Semiconductors have electrical conductivity between conductors and insulators.
Step 1: Pure semiconductors have limited number of charge carriers.
Step 2: Doping means adding a small amount of suitable impurity to a pure semiconductor.
Step 3: Doping increases the number of charge carriers.
Step 4: If pentavalent impurity is added, electrons increase and \(n\)-type semiconductor is formed.
Step 5: If trivalent impurity is added, holes increase and \(p\)-type semiconductor is formed. \[ \boxed{\text{Doping with impurities}} \]
Semiconductors have electrical conductivity between conductors and insulators.
Step 1: Pure semiconductors have limited number of charge carriers.
Step 2: Doping means adding a small amount of suitable impurity to a pure semiconductor.
Step 3: Doping increases the number of charge carriers.
Step 4: If pentavalent impurity is added, electrons increase and \(n\)-type semiconductor is formed.
Step 5: If trivalent impurity is added, holes increase and \(p\)-type semiconductor is formed. \[ \boxed{\text{Doping with impurities}} \]
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