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A teacher in his physics laboratory allotted an experiment to determine the resistance (G) of a galvanometer. Students took the observations for 1/3 deflection in the galvanometer. Which of the below is true for measuring value of G?
  • a)
    1/3 deflection method cannot be used for determining the resistance of the galvanometer.
  • b)
    1/3 deflection method can be used and in this case, the G equals twice the value of shunt resistance(s).
  • c)
    1/3 deflection method can be used and in this case, the G equals three times the value of shunt resistance(s).
  • d)
    1/3 deflection method can be used and in this case, the G value equals the shunt resistance(s).
Correct answer is option 'B'. Can you explain this answer?
Most Upvoted Answer
A teacher in his physics laboratory allotted an experiment to determin...
Explanation:


The resistance (G) of a galvanometer can be determined using the 1/3 deflection method which involves connecting a shunt resistance (s) in parallel with the galvanometer. The students have taken observations for 1/3 deflection in the galvanometer, which means that the current passing through the galvanometer is one-third of its maximum value. Now, based on this information, we can determine the value of G using the following formula:

G = (s/2) x (Ig/Ish)

Where,
s = shunt resistance
Ig = current passing through galvanometer
Ish = current passing through shunt resistance

Option B:


According to option B, the value of G equals twice the value of shunt resistance(s). This is correct because when the current passing through the galvanometer is one-third of its maximum value, the current passing through the shunt resistance is two-thirds of the total current. Therefore, the value of G can be calculated as:

G = (s/2) x (1/3)/(2/3)
G = 2s

Hence, option B is the correct answer.
Free Test
Community Answer
A teacher in his physics laboratory allotted an experiment to determin...
In the galvanometer, as
s G and S are parallel;

⇒ (I - Ig) S = Ig G


⇒  S + G = 3S
⇒ G = 2S
G equals twice the shunt resistance.
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A teacher in his physics laboratory allotted an experiment to determine the resistance (G) of a galvanometer. Students took the observations for 1/3 deflection in the galvanometer. Which of the below is true for measuring value of G?a)1/3 deflection method cannot be used for determining the resistance of the galvanometer.b)1/3 deflection method can be used and in this case, the G equals twice the value of shunt resistance(s).c)1/3 deflection method can be used and in this case, the G equals three times the value of shunt resistance(s).d)1/3 deflection method can be used and in this case, the G value equals the shunt resistance(s).Correct answer is option 'B'. Can you explain this answer?
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A teacher in his physics laboratory allotted an experiment to determine the resistance (G) of a galvanometer. Students took the observations for 1/3 deflection in the galvanometer. Which of the below is true for measuring value of G?a)1/3 deflection method cannot be used for determining the resistance of the galvanometer.b)1/3 deflection method can be used and in this case, the G equals twice the value of shunt resistance(s).c)1/3 deflection method can be used and in this case, the G equals three times the value of shunt resistance(s).d)1/3 deflection method can be used and in this case, the G value equals the shunt resistance(s).Correct answer is option 'B'. Can you explain this answer? for JEE 2024 is part of JEE preparation. The Question and answers have been prepared according to the JEE exam syllabus. Information about A teacher in his physics laboratory allotted an experiment to determine the resistance (G) of a galvanometer. Students took the observations for 1/3 deflection in the galvanometer. Which of the below is true for measuring value of G?a)1/3 deflection method cannot be used for determining the resistance of the galvanometer.b)1/3 deflection method can be used and in this case, the G equals twice the value of shunt resistance(s).c)1/3 deflection method can be used and in this case, the G equals three times the value of shunt resistance(s).d)1/3 deflection method can be used and in this case, the G value equals the shunt resistance(s).Correct answer is option 'B'. Can you explain this answer? covers all topics & solutions for JEE 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for A teacher in his physics laboratory allotted an experiment to determine the resistance (G) of a galvanometer. Students took the observations for 1/3 deflection in the galvanometer. Which of the below is true for measuring value of G?a)1/3 deflection method cannot be used for determining the resistance of the galvanometer.b)1/3 deflection method can be used and in this case, the G equals twice the value of shunt resistance(s).c)1/3 deflection method can be used and in this case, the G equals three times the value of shunt resistance(s).d)1/3 deflection method can be used and in this case, the G value equals the shunt resistance(s).Correct answer is option 'B'. Can you explain this answer?.
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