Use Coupon: CART20 and get 20% off on all online Study Material

Total Price: Rs.

There are no items in this cart.
Continue Shopping
Tushar Watts Grade: 12

In order to inc the resistance of  a  given wire of uniform cross section to four times it's value, a fraction of length of the wire becomes 3/2 times the original length. Show that the value of this fraction is 1/8.

8 years ago

Answers : (1)

Pratham Ashish
17 Points

tushar der is smtng wrong with ur question.

Let us consider that v increase the length of the whole wire to 3/2 times of it original length ,

still the R wud become 9/4 R.IT can't be 4R in any case. 

Consider length is increase to 3/2 times,then its cross section area will become 2/3 times of its original,

the resistance is proportional to length and inversly proportional to area ,

hence the new resistance wud b {(3/2L)/(2/3A)}=9/4*L/A = 2.25R.

So i request u to plz confirm ur qn & repost ur doubt.

8 years ago
Think You Can Provide A Better Answer ?
Answer & Earn Cool Goodies
  • Complete Physics Course - Class 12
  • OFFERED PRICE: Rs. 2,756
  • View Details
  • Complete Physics Course - Class 11
  • OFFERED PRICE: Rs. 2,968
  • View Details

Ask Experts

Have any Question? Ask Experts

Post Question

Answer ‘n’ Earn
Attractive Gift
To Win!!! Click Here for details