2. When an electric current passes through a wire, heat energy is produced. The thermometer reading indicates how much heat energy, H, has been produced. The table below shows the values of H, for different currents, I. Current, I (A) Heat energy, H (J) 1² a. b. d. 0 0.50 1.0 1.5 2.0 2.5 3.0 0 140 600 1400 2500 3800 5500 Does the electric current depend upon the heat energy or does the heat energy depend upon the current? Hence write down the dependent variable. Plot a full size accurate graph of the data. What is the name of the shape of this graph? Use your graph to describe the relationship between the two variables. Write a full sentence. Thermometer To power supply (00000)
2. When an electric current passes through a wire, heat energy is produced. The thermometer reading indicates how much heat energy, H, has been produced. The table below shows the values of H, for different currents, I. Current, I (A) Heat energy, H (J) 1² a. b. d. 0 0.50 1.0 1.5 2.0 2.5 3.0 0 140 600 1400 2500 3800 5500 Does the electric current depend upon the heat energy or does the heat energy depend upon the current? Hence write down the dependent variable. Plot a full size accurate graph of the data. What is the name of the shape of this graph? Use your graph to describe the relationship between the two variables. Write a full sentence. Thermometer To power supply (00000)
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Can you answer these physics questions with working out?
Transcribed Image Text:3.
a. Calculate the values of I' in the third row of the table in question 2.
b.
Plot a fresh graph of H and I².
c. The new graph should be straight. Calculate the gradient of this
graph.
d.
e.
f.
Hence write down an equation for the relationship between H and I.
Use a graph to estimate the heat energy produced by a current of
1.8 A.
Extend your graph to estimate the current needed to produce 6 000 J
of heat energy.
Transcribed Image Text:2. When an electric current passes through a wire, heat energy is produced.
The thermometer reading indicates how much heat energy, H, has been
produced. The table below shows the values of H, for different currents, I.
Current, I (A)
Heat energy, H (J)
12
a.
b.
0
0
0.50 1.0 1.5 2.0 2.5 3.0
140 600 1400 2500 3800 5500
Does the electric current depend upon the heat energy or does the
heat energy depend upon the current? Hence write down the
dependent variable.
Plot a full size accurate graph of the data.
C. What is the name of the shape of this graph?
d. Use your graph to describe the relationship between the two
variables. Write a full sentence.
Thermometer
To power supply
00000
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