Γ Back to Table 5. A student is investigating how the length of a wire affects its resistance. The student connects different lengths of wire to a power supply of fixed voltage and measures the current in each length of wire. (a) The measurements taken by the student are shown in the table. Length of wire (m) 0-20 0.40 0.60 0.80 1.00 Current (A) 0.94 0.66 0.47 0.37 0-32 (i) Using the graph paper, draw a graph of these measurements. (Additional graph paper, if required, can be found on page 38) L X 8 5 7 7 5 0 116* Page 354 Back to Table MARKS DO NOT WRITE IN THIS MARGIN Γ Back to Table MARKS DO NOT WRITE IN THIS 5. (a) (continued) (ii) State whether the resistance of the wire increases, decreases or stays the same, as the length of wire increases. Justify your answer. (iii) Use your graph to predict the current in a 0-50 m length of wire, when connected to the power supply. (iv) Suggest one way in which the experimental procedure could be improved to give more reliable results. [Turn over MARGIN
Γ Back to Table 5. A student is investigating how the length of a wire affects its resistance. The student connects different lengths of wire to a power supply of fixed voltage and measures the current in each length of wire. (a) The measurements taken by the student are shown in the table. Length of wire (m) 0-20 0.40 0.60 0.80 1.00 Current (A) 0.94 0.66 0.47 0.37 0-32 (i) Using the graph paper, draw a graph of these measurements. (Additional graph paper, if required, can be found on page 38) L X 8 5 7 7 5 0 116* Page 354 Back to Table MARKS DO NOT WRITE IN THIS MARGIN Γ Back to Table MARKS DO NOT WRITE IN THIS 5. (a) (continued) (ii) State whether the resistance of the wire increases, decreases or stays the same, as the length of wire increases. Justify your answer. (iii) Use your graph to predict the current in a 0-50 m length of wire, when connected to the power supply. (iv) Suggest one way in which the experimental procedure could be improved to give more reliable results. [Turn over MARGIN
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Transcribed Image Text:Γ
Back to Table
5. A student is investigating how the length of a wire affects its resistance.
The student connects different lengths of wire to a power supply of fixed
voltage and measures the current in each length of wire.
(a) The measurements taken by the student are shown in the table.
Length of wire (m)
0-20
0.40
0.60
0.80
1.00
Current (A)
0.94
0.66
0.47
0.37
0-32
(i) Using the graph paper, draw a graph of these measurements.
(Additional graph paper, if required, can be found on page 38)
L
X 8 5 7 7 5 0 116*
Page 354
Back to Table
MARKS DO NOT
WRITE IN
THIS
MARGIN
Transcribed Image Text:Γ
Back to Table
MARKS DO NOT
WRITE IN
THIS
5. (a) (continued)
(ii) State whether the resistance of the wire increases, decreases or
stays the same, as the length of wire increases.
Justify your answer.
(iii) Use your graph to predict the current in a 0-50 m length of wire,
when connected to the power supply.
(iv) Suggest one way in which the experimental procedure could be
improved to give more reliable results.
[Turn over
MARGIN
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