Question

In a meter bridge, the point D is a neutral point (figure). [NCERT Exemplar]

Answer 1

Answer:

R/S=L/100-L WHERE R AND S ARE THE RESISTANCES IN THE LEFT AND RIGHT GAPS

Explanation:

*The meter bridge can have no other neutral point for this set of resistances because it is constant for particular values of P and Q .

* When the jockey contacts a point on the meter wire to the right of D, current flows from B to the wire through galvanometer.