Question

Two wires of equal cross-sectional area one of copper and other of magnet has the same resistance . which one is longer? ​

Answer 1

Answer:

copper

Explanation:

copper is longer

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Answer 2

Copper

Explanation:

Solution:

Copper has a longer length than magnet because the resistivity of the Copper is lower than magnet.

As resistivity is inversely proportional to length,

• If resistivity increases, length decreases.
• If resistivity decreases, length increases.

Since, copper wire has lower resistivity, it has high length than that of the magnet.

Hence, increase in length indicates that the copper wire has more length and much longer than that of the magnet.