Question

Write about an experiment which demonstrates the comparison between conductivity of metals and non metals

Answer 1

Explanation:

ANSWER:-

Experiment to demonstrate the comparison between conductivity of metals and non metals

Aim- To demonstrate the comparison between conductivity of metals and non metals.

Theory- Metals conduct electricity whereas non metals are insulators.

Materials - Graphite, Alumunium foil, Block of Sulphur in China Dish.

Procedure-

1. Take a bulb, and connect it with the battery.
2. Take the battery of 1.5 volts and connect to positive and negative terminal of the bulb.
3. Now, cut out a part of connected wire.
4. Take one by one the materials, lime Al foil, Sulphur and Graphite.
5. Note the observations.

Observation:

• The metal like Alumunium conduct electricity. The bulb glows
• Only one non metal Graphite is conductor of electricity, whereas Sulphur does not as the bulb doesn't glow .

Precautions :-

• The connections should be tight. Also, mild voltage battery is acceptable.

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Answer 2

Answer :-

Take two rods one of iron and one of any non metal. Now, coat the rod with wax. After, take the rods and let it down in a tray. The tray must contain paraffin wax. Now, Remove them quickly and hold it in a vertical line and allow wax to go down. After wax go down then keep rod aside. Now, take a paintbrush and Paint both rod with a paintbrush dipped in very hot molten wax. Now, it may make some hot, thick coating of wax. Then, be thinned by blowing a Bunsen flame up and down the rod. Now, take some water in a bucket and hold the both rod in water. After that,the distance from the heated end to the melting point of the wax is twice as great for rod X as for rod Y, then rod X has only half the temperature but twice the surface area for heat losses. Thus, the rod X must have four times the conductivity of rod Y.

Take some precaution

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Do not touch it without wearing gloves

Keep it for 2 min to cool