MY CART (5)

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

ITEM
DETAILS
MRP
DISCOUNT
FINAL PRICE
Total Price: Rs.

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


An unknown resistance is to be determined using resistances R1, R and R3. Their correspondins null points are A,B and C. Find which of the above will give the most accurate reading and why??


R=R1 or R2 or R3.

7 years ago

Answers : (1)

pratham ashish
9 Points
										hi,


accod. to wheat stone bridge,

null point means that the potential drop across x resistance = potential drop across legth of wire up to the null point.

let length r La, Lb Lc resp. for the 3 null points measuring form left hand corner.

then, x/La = R1/L-La,(as resistance r parallel)
similarly x/Lb =R2/L-LB and so on.

so u can know the value of unkwown.

accuracy will be in B part as the % error in measuring the length will b minimum.
7 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
Get extra Rs. 551 off
USE CODE: CART20
  • Complete Physics Course - Class 11
  • OFFERED PRICE: Rs. 2,968
  • View Details
Get extra Rs. 594 off
USE CODE: CART20

Ask Experts

Have any Question? Ask Experts

Post Question

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