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An ammeter and a voltmeter of resistance R are connected in series to an electric cell of negligible internal resistance. Their readings are A and V, respectively. If another resistance R is connected in parallel with the voltmeter, then
- a)both A and V will increase.
- b)both A and V will decrease.
- c)A will decrease and V will increase.
- d)A will increase and V will decrease.
Correct answer is option 'D'. Can you explain this answer?
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Most Upvoted Answer
An ammeter and a voltmeter of resistance Rare connected in series to a...
Explanation:
When an ammeter and a voltmeter are connected in series to an electric cell of negligible internal resistance, the circuit looks like this:
Where, A is the ammeter reading and V is the voltmeter reading.
Now, when another resistance R is connected in parallel with the voltmeter, the circuit looks like this:
Let's analyze how this affects the ammeter and voltmeter readings:
1. Ammeter Reading
- When the resistance R is connected in parallel with the voltmeter, some of the current that was flowing through the voltmeter will now flow through the resistance R.
- As a result, the current flowing through the ammeter will decrease because some of it is now flowing through the resistance R instead of the voltmeter.
- Therefore, the ammeter reading will decrease.
2. Voltmeter Reading
- When the resistance R is connected in parallel with the voltmeter, the total resistance of the circuit decreases because R is in parallel with the voltmeter.
- As a result, the current flowing through the circuit increases because the voltage of the cell remains constant.
- Therefore, the voltmeter reading will increase because the voltage across the voltmeter (which is in parallel with R) is now higher due to the increased current flowing through it.
Conclusion:
- As the ammeter reading decreases and the voltmeter reading increases, the correct option is (D) A will increase and V will decrease.
When an ammeter and a voltmeter are connected in series to an electric cell of negligible internal resistance, the circuit looks like this:
Where, A is the ammeter reading and V is the voltmeter reading.
Now, when another resistance R is connected in parallel with the voltmeter, the circuit looks like this:
Let's analyze how this affects the ammeter and voltmeter readings:
1. Ammeter Reading
- When the resistance R is connected in parallel with the voltmeter, some of the current that was flowing through the voltmeter will now flow through the resistance R.
- As a result, the current flowing through the ammeter will decrease because some of it is now flowing through the resistance R instead of the voltmeter.
- Therefore, the ammeter reading will decrease.
2. Voltmeter Reading
- When the resistance R is connected in parallel with the voltmeter, the total resistance of the circuit decreases because R is in parallel with the voltmeter.
- As a result, the current flowing through the circuit increases because the voltage of the cell remains constant.
- Therefore, the voltmeter reading will increase because the voltage across the voltmeter (which is in parallel with R) is now higher due to the increased current flowing through it.
Conclusion:
- As the ammeter reading decreases and the voltmeter reading increases, the correct option is (D) A will increase and V will decrease.
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Community Answer
An ammeter and a voltmeter of resistance Rare connected in series to a...
The total resistance of circuit would decrease as resistance R is connected in parallel. So, the reading of the ammeter would increase, Reading of the voltmeter would decrease as the final resistance across the voltmeter decreases due to parallel connection of resistance R. In series combination, the potential difference is directly proportional to the resistance.
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An ammeter and a voltmeter of resistance Rare connected in series to an electric cell of negligible internal resistance. Their readings are Aand V, respectively. If another resistance Ris connected in parallel with the voltmeter, thena)both Aand Vwill increase.b)both Aand Vwill decrease.c)A will decrease and Vwill increase.d)Awill increase and Vwill decrease.Correct answer is option 'D'. Can you explain this answer?
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An ammeter and a voltmeter of resistance Rare connected in series to an electric cell of negligible internal resistance. Their readings are Aand V, respectively. If another resistance Ris connected in parallel with the voltmeter, thena)both Aand Vwill increase.b)both Aand Vwill decrease.c)A will decrease and Vwill increase.d)Awill increase and Vwill decrease.Correct answer is option 'D'. 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 An ammeter and a voltmeter of resistance Rare connected in series to an electric cell of negligible internal resistance. Their readings are Aand V, respectively. If another resistance Ris connected in parallel with the voltmeter, thena)both Aand Vwill increase.b)both Aand Vwill decrease.c)A will decrease and Vwill increase.d)Awill increase and Vwill decrease.Correct answer is option 'D'. Can you explain this answer? covers all topics & solutions for JEE 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for An ammeter and a voltmeter of resistance Rare connected in series to an electric cell of negligible internal resistance. Their readings are Aand V, respectively. If another resistance Ris connected in parallel with the voltmeter, thena)both Aand Vwill increase.b)both Aand Vwill decrease.c)A will decrease and Vwill increase.d)Awill increase and Vwill decrease.Correct answer is option 'D'. Can you explain this answer?.
An ammeter and a voltmeter of resistance Rare connected in series to an electric cell of negligible internal resistance. Their readings are Aand V, respectively. If another resistance Ris connected in parallel with the voltmeter, thena)both Aand Vwill increase.b)both Aand Vwill decrease.c)A will decrease and Vwill increase.d)Awill increase and Vwill decrease.Correct answer is option 'D'. 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 An ammeter and a voltmeter of resistance Rare connected in series to an electric cell of negligible internal resistance. Their readings are Aand V, respectively. If another resistance Ris connected in parallel with the voltmeter, thena)both Aand Vwill increase.b)both Aand Vwill decrease.c)A will decrease and Vwill increase.d)Awill increase and Vwill decrease.Correct answer is option 'D'. Can you explain this answer? covers all topics & solutions for JEE 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for An ammeter and a voltmeter of resistance Rare connected in series to an electric cell of negligible internal resistance. Their readings are Aand V, respectively. If another resistance Ris connected in parallel with the voltmeter, thena)both Aand Vwill increase.b)both Aand Vwill decrease.c)A will decrease and Vwill increase.d)Awill increase and Vwill decrease.Correct answer is option 'D'. Can you explain this answer?.
Solutions for An ammeter and a voltmeter of resistance Rare connected in series to an electric cell of negligible internal resistance. Their readings are Aand V, respectively. If another resistance Ris connected in parallel with the voltmeter, thena)both Aand Vwill increase.b)both Aand Vwill decrease.c)A will decrease and Vwill increase.d)Awill increase and Vwill decrease.Correct answer is option 'D'. Can you explain this answer? in English & in Hindi are available as part of our courses for JEE.
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