KCET · Physics · Ray Optics
In metre bridge experiment, with a standard resistance in the right gap and a resistance coil
dipped in water (in a beaker) in the left gap, the balancing length obtained is '1'. If the
temperature of water is increased, the new balancing length is
- A \(>l \)
- B \( < l \)
- C \( =l \)
- D \( =0 \)
Answer & Solution
Correct Answer
(A) \(>l \)
Step-by-step Solution
Detailed explanation
Given, balancing length of bridge with standard resistance in right gap and a resistance coil dipped in water in left gap is
\( I=1 \). If temperature of water is increased the new balancing length is greater than \( 1 \).
Unknown resistance is calculated as \( X=R \frac{l}{(1-l)} \)
If temperature increases then resistance increases. Thus, option (1) is correct.
\( I=1 \). If temperature of water is increased the new balancing length is greater than \( 1 \).
Unknown resistance is calculated as \( X=R \frac{l}{(1-l)} \)
If temperature increases then resistance increases. Thus, option (1) is correct.
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