Question

The resistance in the two arms of the meter bridge are 5 Ω and R Ω , respectively. When the resistance R is shunted with an equal resistance, the new balance point is at 1.6ℓ1 . The resistance 'R' is :

Answer 1

Answer:

R

5

=

100−l

1

l

1

R/2

5

=

100−1.6l

1

1.6l

1

Solving l

1

=25cm and R=15Ω