COMEDK · Physics · 19. Current Electricity
If \(P=Q=R=10 \Omega\) and \(S=20 \Omega\), then what resistance should be joined with \(S\) to balance the Wheatstone's network?
- A Join a resistance of \(10 \Omega\) in series with \(S\)
- B Join a resistance of \(10 \Omega\) in parallel with \(S\)
- C Join a resistance of \(20 \Omega\) in parallel with \(S\)
- D Join a resistance of \(20 \Omega\) in series with \(S\)
Answer & Solution
Correct Answer
(C) Join a resistance of \(20 \Omega\) in parallel with \(S\)
Step-by-step Solution
Detailed explanation
The given Wheatstone bridge eircuit is shown belin. Wheatstune is bulanced only when \[ \frac{P}{Q}=\frac{k}{\mathrm{~S}} \] Thus, the value of resistance \(S\) should be 10 \(\Omega\). Hut it is given to \(20 \Omega\). Hence, to decresese its vulue upto \(10 \Omega\), suppose…
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