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Current Electricity
Question
At room temperature (27.0 °C) the resistance of a heating element is 100 Ω. What is the temperature of the element if the resistance is found to be 117 Ω, given that the temperature co-efficient of the material of the resistor is 1.70 x 10–4 °C–1.
Solution
Given,
Resistance of the element,
Resistance of heating element at room temperature,
Temperature coeffient of the material of resistor, = 1.70 x 10–4 °C–1
Now, using the relation
we get,
is the required temperature of the element.
Some More Questions From Current Electricity Chapter
What conclusion can you draw from the following observations on a resistor made of alloy manganin?
Current A
Voltage V
Current A
Voltage V
0.2
0.4
0.6
0.8
1.0
2.0
3.94
7.87
11.8
15.7
19.7
39.4
3.0
4.0
5.0
6.0
7.0
8.0
59.2
78.8
98.6
118.5
138.2
158.0
Current A
Voltage V
Current A
Voltage V
0.2
0.4
0.6
0.8
1.0
2.0
3.94
7.87
11.8
15.7
19.7
39.4
3.0
4.0
5.0
6.0
7.0
8.0
59.2
78.8
98.6
118.5
138.2
158.0
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Mock Test Series
Mock Test Series