0

ADNAN MUHAMMED

Grade 12,

Courses New

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.


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.

Grade:12

1 Answers

pratham ashish
9 Points
14 years ago
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.

Think You Can Provide A Better Answer ?

Other Related Questions on Electric Current

View all Questions »

ASK QUESTION

Get your questions answered by the expert for free

Answer and earn gift vouchers

Win Gift vouchers upto Rs 500/-

View courses by askIITians

Design classes One-on-One in your own way with Top IITians/Medical Professionals

Click Here Know More

Complete Self Study Package designed by Industry Leading Experts

Click Here Know More

Live 1-1 coding classes to unleash the Creator in your Child

Click Here Know More

a Complete All-in-One Study package Fully Loaded inside a Tablet!

Click Here Know More