COMEDK · Physics · 19. Current Electricity
The net resistance between the points A and B in the circuit given below is:
- A \(\dfrac{5}{3} R\)
- B R
- C \(\dfrac{8}{5} R\)
- D \(\dfrac{8}{3} R\)
Answer & Solution
Correct Answer
(D) \(\dfrac{8}{3} R\)
Step-by-step Solution
Detailed explanation
A and E are the same node. The circuit forms a Wheatstone bridge with D and C as middle junctions. Arms: \(R_{ED} = 4R\), \(R_{EC} = 2R\), \(R_{DB} = 4R\), \(R_{CB} = 2R\), cross resistor \(= 5R\) Balance check: \(\dfrac{R_{ED}}{R_{EC}} = \dfrac{4R}{2R} = 2\) and…
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