C. Answer the following in not more than 100 words.
1. What is electrical resistance? On what does the resistance of a piece of material depend? How does resistance affect current?
2. What is a fuse? How does it work?
3. Explain with the help of a diagram the construction and working of an electric bell.
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1) Electrical resistance is a object which resist the flow of electric current. It is proportional to the length of the wire. It is inversely proportional to the area of wire. Resistance resist the flow of current.
2)The fuse breaks the circuit if a fault in an appliance causes too much current to flow. This protects the wiring and the appliance if something goes wrong. The fuse contains a piece of wire that melts easily.
3)The fuse breaks the circuit if a fault in an appliance causes too much current to flow. This protects the wiring and the appliance if something goes wrong. The fuse contains a piece of wire that melts easily.
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