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A galvanometer having a resistance of 50 Ω gives a full scale deflection for a current of 0.05A. The length in meter of a resistance wire of area of cross section 2.97 x 10 − 3 c m 2 that can be used to convert the galvanometer into an ammeter which can be read a maximum of 5A current is [specific resistance of the wire = 5 x 10−7 c m 2 Ω − m ]
  • a)
    9
  • b)
    6
  • c)
    3
  • d)
    1.5
Correct answer is option 'C'. Can you explain this answer?
Most Upvoted Answer
A galvanometer having a resistance of 50 Ω gives a full scale de...
Ohms and a full-scale deflection current of 2 mA is to be converted into an ammeter that can measure up to 10 A. What should be the value of shunt resistance used?

We can use the formula for shunt resistance:

Rs = (Ifs / Imax - 1) x Rg

Where Rs is the shunt resistance, Ifs is the full-scale deflection current of the galvanometer (2 mA), Imax is the maximum current that the ammeter should measure (10 A), and Rg is the resistance of the galvanometer (50 ohms).

Plugging in the values, we get:

Rs = (0.002 A / 10 A - 1) x 50 ohms
Rs = -0.998 x 50 ohms
Rs = -49.9 ohms

This answer doesn't make sense because resistance cannot be negative. The negative sign in the formula indicates that the shunt should be connected in parallel to the galvanometer. Therefore, we can use the absolute value of the answer:

Rs = 49.9 ohms

This means that a shunt resistor of 49.9 ohms should be connected in parallel to the galvanometer to convert it into an ammeter that can measure up to 10 A.
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A galvanometer having a resistance of 50 Ω gives a full scale de...
C
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A galvanometer having a resistance of 50 Ω gives a full scale deflection for a current of 0.05A. The length in meter of a resistance wire of area of cross section 2.97 x 10 − 3 c m 2 that can be used to convert the galvanometer into an ammeter which can be read a maximum of 5A current is [specific resistance of the wire = 5 x 10−7 c m 2 Ω − m ]a)9b)6c)3d)1.5Correct answer is option 'C'. Can you explain this answer?
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A galvanometer having a resistance of 50 Ω gives a full scale deflection for a current of 0.05A. The length in meter of a resistance wire of area of cross section 2.97 x 10 − 3 c m 2 that can be used to convert the galvanometer into an ammeter which can be read a maximum of 5A current is [specific resistance of the wire = 5 x 10−7 c m 2 Ω − m ]a)9b)6c)3d)1.5Correct answer is option 'C'. 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 having a resistance of 50 Ω gives a full scale deflection for a current of 0.05A. The length in meter of a resistance wire of area of cross section 2.97 x 10 − 3 c m 2 that can be used to convert the galvanometer into an ammeter which can be read a maximum of 5A current is [specific resistance of the wire = 5 x 10−7 c m 2 Ω − m ]a)9b)6c)3d)1.5Correct answer is option 'C'. 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 having a resistance of 50 Ω gives a full scale deflection for a current of 0.05A. The length in meter of a resistance wire of area of cross section 2.97 x 10 − 3 c m 2 that can be used to convert the galvanometer into an ammeter which can be read a maximum of 5A current is [specific resistance of the wire = 5 x 10−7 c m 2 Ω − m ]a)9b)6c)3d)1.5Correct answer is option 'C'. Can you explain this answer?.
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