The resistance of a 240V and 200W electric bulb when hot is 10times the resistance when cold. Find its resistance at room temperature. If the working temperature of the filament is `2000^(@)C`. Find the temperature coefficient filament.

Find the resistance of 240 V - 200 watt electric bulb when glowing. If this resistance is 10 times the resistance at 0^(@)C and the temperature of the glowing filament is 2000^(@)C , then find the temperature coefficient of resistance of the filament.

The resistance of the filament of a 110 W, 220 V electric bulb is ,

The resistance of a field coil measures 50 Omega at 20^@ C and 65 Omega at 70^@ C . Find the temperature coefficient of resistance.

An electric bulb is rated as 250V, 750W. Calculate the Resistance of its filament

An electric bulb is rated 60 W , 220 V . The resistance of its filament is

A copper coil has resistance of 20.0 Omega at 0^@C and a resistance of 26.4 Omega at 80^@C . Find the temperature coefficient of resistance of copper.

A copper coil has resistance of 20.0 Omega at 0^@C and a resistance of 26.4 Omega at 80^@C . Find the temperature coefficient of resistance of copper.

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 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.