Assertion : Through the same current flows through the line wires and the filament of the bulb but heat produced in the filament is much higher then that in line wires.
Reason : The filament of bulbs is made of a material of high resistance and high melting point.

Options

A. If both assertion and reason are true and the reason is the correct explanation of the assertion.
B. If both assertion and reason are true but reason is not the correct explanation of the assertion
C. If assertion is true but reason is false
D. If the assertion and reason both are false.

Answer

A

Explanation

As filament of bulb and line wire is in series, hence current through both is same. Because`H = (i^(2)RT)/(4.2)` and resistance of the filament of the bulb is much higher than that of line wires, hence heat produced in the filament is much higher than that in line wires-