An Experiment to Verify Joule's Law

Draw a diagram of this experiment

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Step 1

Place a known mass of water in the calorimeter and find the initial temperature of the water (θf)

Step 2

Set up apparatus as shown

Step 3

Turn on switch and timer simultaneously

Step 4

Keep the current constant, adjusting the rheostat if necessary

Step 5

When the temperature has risen by 2℃, turn off the switch and timer simultaneously and note the final temperature of the water.

Step 6

Repeat steps 1-5 having replaced the water in the calorimeter with the same mass of water as before, with the same starting temperature but increase the current.

Step 7

Repeat step 6 four more times

Step 8

Plot a graph of Δθ Vs I² and find the slope

What is on the x axis of the graph?

I²

What is on the y axis of the graph?

Δθ