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Observe the following circuit given in the figure. - Science

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प्रश्न

Observe the following circuit given in the figure.


Current does not flow in the circuit, if there is a gap between the two wires. Does it indicate that air is a poor conductor of electricity? Does air never conduct electricity? Explain.

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उत्तर

Yes, if current is not flowing through the air gap between the wires, it means that air is a poor conductor of electricity. No, air conducts electricity only when there is great voltage or there is some moisture in air, such as during lightning.

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Conductor of Electricity: Liquid
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अध्याय 14: Chemical Effects of Electric Current - Long Answer Questions [पृष्ठ ८४]

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एनसीईआरटी एक्झांप्लर Science [English] Class 8
अध्याय 14 Chemical Effects of Electric Current
Long Answer Questions | Q 21. | पृष्ठ ८४

संबंधित प्रश्न

Most liquids that conduct electricity are solutions of ________, _______ and ________.


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Paheli had heard that rainwater is as good as distilled water. So, she collected some rain water in a clean glass tumbler and tested it using a tester. To her surprise, she found that the compass needle showed deflection. What could be the reasons?


Observing that the bulb does not glow in the circuit shown in the following figure A, Boojho changed the circuit as shown in the following figure B. He observed deflection in the magnetic compass.

A B
  1. What does the deflection in magnetic compass indicate?
  2. Why did the bulb not glow in the following figure A?
  3. What would be the effect of increase in the number of turns in the coil wound around the magnetic compass in the following figure B?
  4. What will be observed if the number of cells are increased in the circuit shown in the following figure B?

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