Conductor | MCQs

Explanation

Copper, silver, aluminum, gold, steel, and brass are common conductors of electricity.

The most highly conductive metals are silver, copper, and gold

Silver is the first-best conductor of heat.

Copper is the second-best conductor of heat.

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ND30-12-2022

Explanation

Silicon is not the conductor

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Aluminum and gold are metals so they are good conductors of electricity.

Now graphite is an allotropic form of carbon and is the only nonmetal that can conduct electricity.

Silicon is a semiconductor. 

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VU LDC UDC FIA PAPER 27-12-2021

Explanation

Aluminum, Gold, and Graphite are conductors.

1. Aluminum is a metal that conducts electricity and heat.
2. Gold is an excellent conductor of electricity and heat.
3. Graphite is a form of carbon that conducts electricity. 

Explanation

In a solid metal conductor, electric current is due to the flow of free electrons.

Electrons are negatively charged particles that move through the metal to create current.

Explanation

Good conductors of electricity:-

gold,

silver,

copper,

aluminum,

and graphite.

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Bad conductors of electricity:-

plastic,

rubber,

glass,

air,

wood,

charcoal,

and diamond.

ND_16_7_2023

Explanation

Explanation

Silver: Highest electrical conductivity, rated 100 on a scale of 0 to 100.

Copper: Second highest conductivity, rated 97.

Gold: Good conductor with a rating of 76.

Aluminum: Conductivity rating of 60.

Explanation

If two metallic conductors have the same resistivity, they can be differentiated based on their temperature coefficient. 

The temperature coefficient of resistivity indicates how much the resistivity of a material changes with a temperature change.

Materials with the same resistivity can have different temperature coefficients, meaning their resistance will change differently as temperature changes. 

Explanation

Silicon is a metalloid with properties ideal for controlling electrical current.

It's the most widely used material in semiconductor devices like transistors and chips.

Explanation