MHT CET · Physics · Current Electricity
Five current carrying conductors meet at point P. What is the magnitude and direction of the current in conductor PQ?
- A \(1 \mathrm{~A}\) form \(\mathrm{Q}\) to \(\mathrm{P}\)
- B \(1 \mathrm{~A}\) form \(\mathrm{P}\) to \(\mathrm{Q}\)
- C \(3 \mathrm{~A}\) form \(\mathrm{p}\) to \(\mathrm{Q}\)
- D \(2 \mathrm{~A}\) form \(\mathrm{Q}\) to \(\mathrm{P}\)
Answer & Solution
Correct Answer
(B) \(1 \mathrm{~A}\) form \(\mathrm{P}\) to \(\mathrm{Q}\)
Step-by-step Solution
Detailed explanation
According to Kirchhoff's first law, at point \(\mathrm{P}\), \(5 \mathrm{~A}+4 \mathrm{~A}+\mathrm{I}-5 \mathrm{~A}-3 \mathrm{~A}=0 \)
\( \therefore \mathrm{I}=-1 \mathrm{~A} \)
\( \therefore 1 \mathrm{~A} \text { current flows from } \mathrm{P} \text { to } \mathrm{Q}\)
\( \therefore \mathrm{I}=-1 \mathrm{~A} \)
\( \therefore 1 \mathrm{~A} \text { current flows from } \mathrm{P} \text { to } \mathrm{Q}\)
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