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Physics CBSE Live product
Class 7 (2025-26)
Electricity: Circuits and their components
Revision IV - Electricity: Circuits and their components
8.
Electric conductors and insulators
Question:
5
m.
Choose the best answer for the following questions:
1.
Conductors
-
Materials that allow electric current to flow freely
Materials through which electric current cannot pass
Materials that do not allow electric current to pass through them
Materials that allow electric current to flow for few minutes only
2.
Silver
-
One of the best conductors of electricity but cheap for regular wire use
One of the best conductors of heat but expensive for regular wire use
One of the bad conductors of electricity but expensive for regular wire use
One of the best conductors of electricity, yet rarely used for making wires because it is expensive
3.
Insulation
-
The covering of wires with materials that allow electric current to pass
The covering of wires with materials that allow heat from passing
The covering of wires with materials that do not prevent electric current from passing
The covering of wires with materials that prevent electric current from passing
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