MHT CET · Physics · Current Electricity
In the network shown cell of emf E has internal resistance r and the galvanometer shows zero deflection. If the cell is replaced by a new cell of emf 2E and internal resistance 3r keeping everything else identical then
- A The galvanometer will show deflection of 10 divisions.
- B The galvanometer show zero deflection,
- C Current will flow from B to A.
- D Current will flow from A to B.
Answer & Solution
Correct Answer
(B) The galvanometer show zero deflection,
Step-by-step Solution
Detailed explanation
In given circuit diagram, galvanometer shows zero deflection, hence it is a Wheatstone balanced circuit.
Hence,
On replacing a new cell of emf 2E and internal resistance 3r, no effect occurs on balanced condition of bridge, i.e., .
Hence, the galvanometer will shows zero deflection.
Hence,
On replacing a new cell of emf 2E and internal resistance 3r, no effect occurs on balanced condition of bridge, i.e., .
Hence, the galvanometer will shows zero deflection.
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