Question

a piece of platinum and germanium are heated above room temperature then resistance of both will ______
a) increase
b) decrease
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Answer 1

Answer:

decreasetsutrajufsac

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Answer 2

The correct answer is Option(b).

Decrease.

• Platinum is metal and germanium is a none metal.
• In the case of platinum, when it is heated above room temperature, the electrons become free and gain speed in their movement. They collide with each other and due to that, the resistance decreases.
• In the case of germanium, as the semiconductor is heated, the bond between electrons is broken and they gain speed. Electrons help in the conduction, as they move freely the resistance decreases.

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