Question
What is the equivalent resistance between A and B in given figure?
50 Ω
25 Ω
75 Ω
100 Ω
Solution
A.
50 Ω
The Wheatstone bridge is the interconnection of four resistances forming a bridge. The four resistance in circuit ars referred as arms of the bridge. The bridge is used for finding the value of an unknown resistance connected with two known resistors, one variable and a galvanometer.
Given circuit is a balanced Wheatstone bridge. So circuit becomes
Equivalent resistance
R =
R =
R = 50 Ω
