The filament of a bulb is

The filament of a bulb should have a high melting point.Why?

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 than that in line wires. Reason: The filament of bulbs is made of a material of high resistance and high melting point.

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.

When electric current is passed through the filament of a bulb, it gives off : A.Sound B.Heat C.Magnetism D.Light

A potential difference is applied across the filament of a bulb at t =0, and it is maintained at a constant value while the filament gets heated to its equilibrium temperautre. We find that the final current in the filament is one sixth of the current drawn at t = 0. if the temperature of the filament at t = 0 is 20^@C and the temperature coefficient of resistivity at 20^@C is 0.0043 ^@C^(-1), find the final temperature of the filament.

A potential difference is applied across the filament of a bulb at t = 0 and it is maintained at a constant value while the filament gets heated to its equilibrium temperature. We find that final current in the filament is one fifth the current drawn at t = 0 . If the temperature of filament at t = 0 is 20^(@)C and the temperature coefficient of resistivity at 20^(@)C is 0.004(.^(@)C)^-1 , find the final temperature of the filament.