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Question
A metre bridge is set-up as shown to determine an unknown resistance X using a standard 10 ohm resistor. The galvanometer shows null point when tapping-key is at 52 cm mark. The end-corrections are 1 cm and 2 cm respectively for the ends A and B. The determined value of X is ______.
Options
10.2 ohm
10.6 ohm
10.8 ohm
11.1 ohm
MCQ
Fill in the Blanks
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Solution
A metre bridge is set-up as shown to determine an unknown resistance X using a standard 10 ohm resistor. The galvanometer shows null point when tapping-key is at 52 cm mark. The end-corrections are 1 cm and 2 cm respectively for the ends A and B. The determined value of X is 10.6 ohm.
Explanation:
According to the balance condition of Wheatstone bridge,
`"X"/10 = (52 +1)/(48 + 2)`
` therefore "X" = 10.6 Omega`
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