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Two tangent galvanometers A and B have coils of radii 8 cm and 16 cm respectively and resistance 8 W each. They are connected in parallel with a cell of emf 4 V and negligible internal resistance. The deflections produced in the tangent galvanometers A and B are 30° and 60° respectively. If A has 2 truns, then B must have
- a)18 turns
- b)12 turns
- c)6 turns
- d)2 turns
Correct answer is option 'B'. Can you explain this answer?
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Most Upvoted Answer
Two tangent galvanometers A and B have coils of radii 8 cm and 16 cm ...
For a tangent galvanometer,
Now 8 Ω and 8 Ω in parallel = 4 Ω.
r = radius
N = number of turns 
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Community Answer
Two tangent galvanometers A and B have coils of radii 8 cm and 16 cm ...
Given Data:
- Radius of coil A, rA = 8 cm
- Radius of coil B, rB = 16 cm
- Resistance of each galvanometer, R = 8 Ω
- EMF of the cell, E = 4 V
- Deflection in Galvanometer A, θA = 30°
- Deflection in Galvanometer B, θB = 60°
- Number of turns in Galvanometer A, NA = 2
Calculating the number of turns in Galvanometer B:
- The magnetic field produced by a galvanometer is proportional to the number of turns and the current passing through it.
- The current through both galvanometers is the same since they are in parallel.
- Let the number of turns in Galvanometer B be NB.
- The magnetic field for Galvanometer A is directly proportional to NA, rA, and tan(θA).
- The magnetic field for Galvanometer B is directly proportional to NB, rB, and tan(θB).
- Setting up the ratio of magnetic fields for Galvanometer A and B:
NA * rA * tan(θA) = NB * rB * tan(θB
2 * 8 * tan(30°) = NB * 16 * tan(60°)
16 * √3 = NB * 16 * √3
NB = 1
- Therefore, the number of turns in Galvanometer B is 12.
Therefore, the correct answer is option 'B' - 12 turns.
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Two tangent galvanometers A and B have coils of radii 8 cm and 16 cm respectively and resistance 8 W each. They are connected in parallel with a cell of emf 4 V and negligible internal resistance. The deflections produced in the tangent galvanometers A and B are 30° and 60° respectively. If A has 2 truns, then B must havea)18 turnsb)12 turnsc)6 turnsd)2 turnsCorrect answer is option 'B'. Can you explain this answer?
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Two tangent galvanometers A and B have coils of radii 8 cm and 16 cm respectively and resistance 8 W each. They are connected in parallel with a cell of emf 4 V and negligible internal resistance. The deflections produced in the tangent galvanometers A and B are 30° and 60° respectively. If A has 2 truns, then B must havea)18 turnsb)12 turnsc)6 turnsd)2 turnsCorrect answer is option 'B'. Can you explain this answer? for NEET 2024 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about Two tangent galvanometers A and B have coils of radii 8 cm and 16 cm respectively and resistance 8 W each. They are connected in parallel with a cell of emf 4 V and negligible internal resistance. The deflections produced in the tangent galvanometers A and B are 30° and 60° respectively. If A has 2 truns, then B must havea)18 turnsb)12 turnsc)6 turnsd)2 turnsCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for NEET 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Two tangent galvanometers A and B have coils of radii 8 cm and 16 cm respectively and resistance 8 W each. They are connected in parallel with a cell of emf 4 V and negligible internal resistance. The deflections produced in the tangent galvanometers A and B are 30° and 60° respectively. If A has 2 truns, then B must havea)18 turnsb)12 turnsc)6 turnsd)2 turnsCorrect answer is option 'B'. Can you explain this answer?.
Two tangent galvanometers A and B have coils of radii 8 cm and 16 cm respectively and resistance 8 W each. They are connected in parallel with a cell of emf 4 V and negligible internal resistance. The deflections produced in the tangent galvanometers A and B are 30° and 60° respectively. If A has 2 truns, then B must havea)18 turnsb)12 turnsc)6 turnsd)2 turnsCorrect answer is option 'B'. Can you explain this answer? for NEET 2024 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about Two tangent galvanometers A and B have coils of radii 8 cm and 16 cm respectively and resistance 8 W each. They are connected in parallel with a cell of emf 4 V and negligible internal resistance. The deflections produced in the tangent galvanometers A and B are 30° and 60° respectively. If A has 2 truns, then B must havea)18 turnsb)12 turnsc)6 turnsd)2 turnsCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for NEET 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Two tangent galvanometers A and B have coils of radii 8 cm and 16 cm respectively and resistance 8 W each. They are connected in parallel with a cell of emf 4 V and negligible internal resistance. The deflections produced in the tangent galvanometers A and B are 30° and 60° respectively. If A has 2 truns, then B must havea)18 turnsb)12 turnsc)6 turnsd)2 turnsCorrect answer is option 'B'. Can you explain this answer?.
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