resistance in the right gap at a distance of 42 cm from
the left end. What is the value of the unknown resistence?
the left end. What is the value of the unknown resistence?
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Let
P = 42 x p
Q = (100 -42) x p = 58 x p
Now
P/Q = R/X
Or X = Q/P x R
= [(58 x p) / (42 x p)] x 5
= 6.91 Ohm
P = 42 x p
Q = (100 -42) x p = 58 x p
Now
P/Q = R/X
Or X = Q/P x R
= [(58 x p) / (42 x p)] x 5
= 6.91 Ohm
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Let the resistance per unit length of the wire be R
Applying Wheatstone's bridge, (Product of opposites should be equal)
5 (42 x R) = X (58 x R) X is unknown resistance
X = 3.62 ohms
Applying Wheatstone's bridge, (Product of opposites should be equal)
5 (42 x R) = X (58 x R) X is unknown resistance
X = 3.62 ohms