7. A peice of copper wire of resistance 20ohm is drawn out so that
its length is increased to twice its original length calculate
the resistance of the wire in the new situation
Answers
Answered by
1
Answer:
as resistance is directly proportional to length the resistance also increases to twice
and area is decreased to half so resistance is increased by 4 times that is 4 ×20 =80 ohm
Similar questions