Question

23. Explain the following
A. Why are conductors of electric heating device such as toaster and electric iron made of
an alloy rather than a pure metal?
В. How does the resistance of a wire vary with its cross sectional area?
C. Why is series arrangement not used for domestic circuits?
(1+1+1)​

Answer 1

Answer:

A.

Conductor of electric heating devices such as toaster or electric iron is made of an alloy rather than pure metal because if electric heating devices are made up of pure metal then the metal melt easily when heat is increase and pure metal get corrode easily.

B.

The resistance of a wire is directly proportional to its length and inversely proportional to its cross-sectional area

C.

In a series connection, if one electrical appliance stops working due to some defect, then all other appliances would stop working. ... In a series connection, all the appliances do not get the same voltage as the voltage gets divided in series combination.