Question

In a meter bridge, the value of resistance in the resistance box is 10 . The balancing length is l1 = 55cm. Find the value of unknown resistance.

Answer 1

Answer: 12.2222ohm

Explanation

Since

unknown resistance=

length×known resistance/100-length

By putting values we get

Unknown resistance

=55×10/100-55

=550/45=12.2222 ohm

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Answer 2

Answer:

Explanation:

the value of unknown resistance=(known resistance)(100-l)/l

in qns : known resistance=10 ohm

l=55cm

by using formula:10*45/55

                           =450/55

                           =90/11

                           =8.18 Ω