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
3.94
3.0
59.2
0.4
7.87
4.0
78.8
0.6
11.8
5.0
98.6
0.8
15.7
6.0
118.5
1.0
19.7
7.0
138.2
2.0
39.4
8.0
158.0
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Solution
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Since the resistance is constant even when current and Voltage are very high, Ohms law is valid to a high accuracy. This shows that resistivity of the alloy manganin is nearly independent of temperature.
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Similar Questions
Q1
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
3.94
3.0
59.2
0.4
7.87
4.0
78.8
0.6
11.8
5.0
98.6
0.8
15.7
6.0
118.5
1.0
19.7
7.0
138.2
2.0
39.4
8.0
158.0
View Solution
Q2
What conclusion can you draw from the following observations on a resistor made of alloy manganin? Current Voltage Current Voltage A V A V 0.2 3.94 3.0 59.2 0.4 7.87 4.0 78.8 0.6 11.8 5.0 98.6 0.8 15.7 6.0 118.5 1.0 19.7 7.0 138.2 2.0 39.4 8.0 158.0
View Solution
Q3
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
3.94
3.0
59.2
0.4
7.87
4.0
78.8
0.6
11.8
5.0
98.6
0.8
15.7
6.0
118.5
1.0
19.7
7.0
138.2
2.0
39.4
8.0
158.0
View Solution
Q4
The values of current(I) flowing through a given resistor of resistance (R), for the corresponding values of potential difference (V) across the resistor are as given.
V(volts)
0.5
1.0
1.5
2.0
2.5
3.0
4.0
5.0
I(amperes)
0.1
0.2
0.3
0.4
0.5
0.6
0.8
1.0
Plot a graph between current(I) and potential difference (V) and determine the resistance (R) of the resistor.
View Solution
Q5
What is the current through a 5.0 ohm resistor if the voltage across it is 10 V?