Question

The resistance of a 1m long
nichrome wire is 6 12. If we reduce
the length of the wire to 70 cm.
what will its resistance be?​

Answer 1

Answer:

4.284 Ω

Explanation:

R = ρ L/A

R is directly proportional to L

6.12 Ω when length is 1m.

70cm = 70/100 = 0.7 m

When length 0.7m = 6.12 x 0.7

                               =4.284 Ω

Answer 2

Answer:

The resistance of a 1m long nichrome wire is 6 Ω. If we reduce the length of the wire to 70 cm. What will its resistance be?

Answer

$r = p \frac{l}{a}$

R is directly proportional to L

6ohm when length is 1m

When length7cm=×61×0.7

=4.2ohm.