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The Resistance of 11 is Connected in Right Gap. If Null Point is Obtained at a Distance of 45 Cm from the Left End, Find the Resistance of Metal Ring. - Physics

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Question

Two diametrically opposite points of a metal ring are connected to two terminals of the left gap of meter bridge. The resistance of 11 Ω is connected in right gap. If null point is obtained at a distance of 45 cm from the left end, find the resistance of metal ring.

Solution

R = 11Ω , lx = 45cm

lr=100-lx=55cm

Let x be theresistance of metal ring

∴Equivalent resistance in left gap

`1/R_p=1/(x`

`:. R_p=x/4`

From balancing condition

`:.R_p/R=l_x/(100-l_x)`

`(x`

`:.x/4=45/55xx11`

∴ x=9x4

∴x=36Ω

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APPEARS IN

 2013-2014 (March) (with solutions)
Question 7.2.2 | 3.00 marks
Solution The Resistance of 11 is Connected in Right Gap. If Null Point is Obtained at a Distance of 45 Cm from the Left End, Find the Resistance of Metal Ring. Concept: Meter Bridge.
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