
Drag the ÃƒÂ¢Ã¢â€šÂ¬Ã‹Å“ResistorÃƒÂ¢Ã¢â€šÂ¬Ã¢â€žÂ¢ to the gap 2 and 3 of the Carey fosters bridge.

Drag ÃƒÂ¢Ã¢â€šÂ¬Ã‹Å“Fractional resistor' to gap 1.

Drag the Battery to space in between the two ÃƒÂ¢Ã¢â€šÂ¬Ã‹Å“ResistorsÃƒÂ¢Ã¢â€šÂ¬Ã¢â€žÂ¢.

Drag the copper strip to gap 4.

Press the continue button, on the top.

Click and unmark the resistance which has to be introduced in ÃƒÂ¢Ã¢â€šÂ¬Ã‹Å“ResistorÃƒÂ¢Ã¢â€šÂ¬Ã¢â€žÂ¢.

Power On button to start and power off to stop the experiment.

Change the position of jockey to get balancing length l_{1}ÃƒÂ¢Ã¢â€šÂ¬Ã¢â€žÂ¢.

Reverse connection button to interchange copper strip with fractional resistor.

Move jockey to get balancing length l_{2}ÃƒÂ¢Ã¢â€šÂ¬Ã¢â€žÂ¢.

Resistance per cm of bridge wire is found using equation

Repeat the experiment for different values of Resistance.

Repeat steps 13.

Drag ÃƒÂ¢Ã¢â€šÂ¬Ã‹Å“Unknown resistance 1ÃƒÂ¢Ã¢â€šÂ¬Ã¢â€žÂ¢ to gap 4 in bridge.

Introduce the resistance and move jockey to get balancing length l_{1}.

Reverse button to interchange unknown resistance 1 with Fractional resistor.

Move jockey to get balancing length l_{2}.

Unknown resistance value is found using the equation

Repeat the experiment for different temperature t_{1}, t_{2}ÃƒÂ¢Ã¢â€šÂ¬Ã‚Â¦.and note corresponding resistance X_{1}, X_{2}...

Temperature coefficient of resistance is found using equation

Repeat the experiment for unknown resistance 2.

A graph is plotted between values of X and t , which gives a straight line, whose slope is ÃƒÅ½Ã‚Â±.