Question

give scientific reasons :-
1) In an electric iron the coil of high resistance is kept between mica sheets.

2)In winter, the pipelines carrying water burst in cold countries.

3) Even though heat is supplied to boiling water, there is no increase in its temperature.

whoever give answers first of these questions I will mark them as brainliest ​

Answer 1

Answer:

1. Mica is a bad conductor of electricity and good conductor of heat. In an electric iron, the coil of high resistance is kept between mica sheets so that there is no electrical contact between the coil and the heavy metal block of the iron though there is heat transfer. This protects the user from getting an electric shock.
2. In cold countries, in winter, the temperature of the atmosphere falls below 0 degree C. When the temperature of water falls below 4 degree C, it expands. Hence, the water in pipes expands. ... Hence, the pipelines carrying water burst.
3. Even though heat is supplied to boiling water, there is no increase in its temperature. Solution : Once water starts boiling, all the heat supplied to it is used in conversion of water into steam at the boiling point of water. Hence, there is no rise in its temperature.