Question

The resistivity of copper is less than that of aluminium which in turn is less than that of
constantan. There are nine wires, labelled as A, B, C, D, E, F, G, H, I, that have been
designed as per the tabular details given below:
Answer the following questions:
Length
Resistance
A
1
d
Constantan
R
1
Copper
E
1
Copper
R
1
33
Copper
Copper
G
2
1
SISIS
1
R
2
Aluminium
1. Arrange the three values R. R. R3 in increasing order.
2. Arrange the three values R. Rs, Rein decreasing order
3. Which of the two
(D) R: and RO
(ii) R, and Rs
has a lower value?
4. Will the graph between R. Rz, and R, (on the y-axis) and their corresponding length
values (on the x-axis) be a straight line?
5. What is the likely value of the ratio Re/R?​

Answer 1

Answer:

Wire C has maximum resistance because it has maximum length, least thickness and highest resistivity. Wire F has the minimum resistance since it has least length, maximum thickness and least resistivity.

Explanation: