The Number Density N of Conduction Electrons, the Resistivity $\alpha$ Are Given Below for Five Materials

question 49

Multiple Choice

The number density n of conduction electrons, the resistivity , and the temperature coefficient of resistivity $\alpha$ are given below for five materials.Which is a semiconductor?

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Definitions:

Forward Bias

In electronics, a condition where the positive end of a voltage source is connected to the p-type material and the negative end to the n-type material of a semiconductor, allowing current flow.

Bipolar Transistor

A transistor that operates like a switched diode. It contains base, emitter, and collector terminals and can have NPN or PNP biasing.

Non-Contact Throttle Position Sensors

Sensors that detect the position of the throttle valve without direct contact, using magnetic or optical technology to improve response and reliability.

Variable Capacitance

The capability of a capacitor to change its capacitance value in response to a change in an external condition, such as voltage or mechanical stress.