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A galvanometer of resistance 50Ω is connected to a battery of 3V along with a resistance of 2950Ω in series. A full-scale deflection of 30 divisions is obtained in the galvanometer. In order to reduce this deflection to 20 divisions, the resistance in series should be:
  • a)
    6050 Ω
  • b)
    4450 Ω
  • c)
    5050 Ω
  • d)
    5550 Ω
Correct answer is option 'B'. Can you explain this answer?
Verified Answer
A galvanometer of resistance 50Ω is connected to a battery of 3V...
Total initial resistance
= G + R = 50Ω + 2950Ω = 3000Ω
Current,I = 
= 1 × 10−3 A = 1mA
If the deflection has to be reduced to 20 divisions, then current

Let x be the effective resistance of the circuit,
3V = 3000Ω × 1mA =  
or x = 
∴  Resistance to be added =(4500Ω − 50Ω) = 4450Ω 
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A galvanometer of resistance 50Ω is connected to a battery of 3V...
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A galvanometer of resistance 50Ω is connected to a battery of 3V along with a resistance of 2950Ω in series. A full-scale deflection of 30 divisions is obtained in the galvanometer. In order to reduce this deflection to 20 divisions, the resistance in series should be:a)6050Ωb)4450Ωc)5050 Ωd)5550ΩCorrect answer is option 'B'. Can you explain this answer?
Question Description
A galvanometer of resistance 50Ω is connected to a battery of 3V along with a resistance of 2950Ω in series. A full-scale deflection of 30 divisions is obtained in the galvanometer. In order to reduce this deflection to 20 divisions, the resistance in series should be:a)6050Ωb)4450Ωc)5050 Ωd)5550ΩCorrect 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 A galvanometer of resistance 50Ω is connected to a battery of 3V along with a resistance of 2950Ω in series. A full-scale deflection of 30 divisions is obtained in the galvanometer. In order to reduce this deflection to 20 divisions, the resistance in series should be:a)6050Ωb)4450Ωc)5050 Ωd)5550ΩCorrect 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 A galvanometer of resistance 50Ω is connected to a battery of 3V along with a resistance of 2950Ω in series. A full-scale deflection of 30 divisions is obtained in the galvanometer. In order to reduce this deflection to 20 divisions, the resistance in series should be:a)6050Ωb)4450Ωc)5050 Ωd)5550ΩCorrect answer is option 'B'. Can you explain this answer?.
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