Think and answer
1. Why does dust accumulate on ceiling fans?
2. Why is a gold leaf electroscope enclosed in a glass case?
3. Why does current flow through the earth wire?
4. Why is a switch for any appliance always connected to the live wire?
5. What would happen if electrical appliance always connected to the live wire?
6. Why does a fuse were have lower melting point than that of connecting wires?
Answers
Answer:
1.As the blades rotate, they experience frictional forces as they `rub' against the air; this knocks electrons around, causing the blades to build up a net charge. The charged dust particles then stick to the charged areas of the blades. ... "So the dust doesn't collect on the blades simply by `falling' or landing on them.
2.gold-leaf type electroscope is a device used to detect the presence of electric charge on a body and its relative amount. ... To protect the gold leaves from drafts of air they are typically enclosed in a glass bottle or glass-walled chamber, usually open at the bottom and mounted over a conductive base.
3.The current flows from one point of the circuit, through ground, then back into the circuit. ... It can't flow to ground, because there is nowhere for it to flow. Earthing is used to protect you from an electric shock. It does this by providing a path for a fault current to flow to earth.
sorry couldn't complete rest of them