Doping in a semiconductor increases which quantity

Electrical Engineering XYZ MCQs

Doping in a semiconductor increases which quantity:

1. Inductance
2. Resistance
3. Conductance
4. None of these

Correct answer: 3. Conductance

Explanation: Doping in a semiconductor primarily affects its electrical properties, particularly its conductivity. When a semiconductor is doped, impurities are intentionally added to modify its electrical behavior. These impurities introduce additional charge carriers into the semiconductor crystal lattice, either by adding extra electrons (n-type doping) or by creating electron deficiencies known as “holes” (p-type doping).

Now, let’s analyze the options:

1. Inductance: Inductance is a property related to the behavior of inductors in electrical circuits. Doping in a semiconductor does not directly affect inductance.
2. Resistance: Doping in a semiconductor can affect its resistance. However, the impact depends on the type of doping and concentration. Generally, doping can either increase or decrease the resistance of a semiconductor, but it does not universally increase or decrease it.
3. Conductance: Doping in a semiconductor significantly affects its conductance. By introducing additional charge carriers, doping increases the conductivity of the semiconductor, making it easier for electric current to flow through it. Therefore, conductance increases with doping.
4. None of these: This option is incorrect because, as explained, doping in a semiconductor does affect conductance.

So, the correct answer is Conductance. Doping in a semiconductor increases its conductance by introducing additional charge carriers.