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Ten identical cells each of emf E and internal resistance r are connected in series to form a closed circuit. An ideal voltmeter connected across 3cells will read?
Verified Answer
Ten identical cells each of emf E and internal resistance r are connec...
No. of cells = 10
Emf = E
Internal resistance = r
Let I = current through the ckt
Emf = E
Internal resistance = r
Let I = current through the ckt
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Ten identical cells each of emf E and internal resistance r are connec...
Analysis of the Circuit
- When the ten identical cells are connected in series, the total emf of the circuit is 10E, and the total internal resistance is 10r.
- The total emf across the circuit remains the same, but the internal resistance increases as the number of cells increases.
Reading of the Voltmeter
- When the voltmeter is connected across 3 cells in series, the effective emf is 3E and the effective internal resistance is 3r.
- The current flowing through the circuit can be calculated using Ohm's Law: I = (3E) / (3r + 3r).
- The voltmeter reading can be obtained by multiplying the current with the total internal resistance across the 3 cells: V = I * 3r.
Calculation
- Substituting the values, we get I = (3E) / (6r) = 0.5E/r.
- Therefore, V = (0.5E/r) * 3r = 1.5E.
Conclusion
- The ideal voltmeter connected across 3 cells will read 1.5 times the emf of a single cell.
- When the ten identical cells are connected in series, the total emf of the circuit is 10E, and the total internal resistance is 10r.
- The total emf across the circuit remains the same, but the internal resistance increases as the number of cells increases.
Reading of the Voltmeter
- When the voltmeter is connected across 3 cells in series, the effective emf is 3E and the effective internal resistance is 3r.
- The current flowing through the circuit can be calculated using Ohm's Law: I = (3E) / (3r + 3r).
- The voltmeter reading can be obtained by multiplying the current with the total internal resistance across the 3 cells: V = I * 3r.
Calculation
- Substituting the values, we get I = (3E) / (6r) = 0.5E/r.
- Therefore, V = (0.5E/r) * 3r = 1.5E.
Conclusion
- The ideal voltmeter connected across 3 cells will read 1.5 times the emf of a single cell.
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Ten identical cells each of emf E and internal resistance r are connected in series to form a closed circuit. An ideal voltmeter connected across 3cells will read?
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Ten identical cells each of emf E and internal resistance r are connected in series to form a closed circuit. An ideal voltmeter connected across 3cells will read? for Class 12 2024 is part of Class 12 preparation. The Question and answers have been prepared according to the Class 12 exam syllabus. Information about Ten identical cells each of emf E and internal resistance r are connected in series to form a closed circuit. An ideal voltmeter connected across 3cells will read? covers all topics & solutions for Class 12 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Ten identical cells each of emf E and internal resistance r are connected in series to form a closed circuit. An ideal voltmeter connected across 3cells will read?.
Ten identical cells each of emf E and internal resistance r are connected in series to form a closed circuit. An ideal voltmeter connected across 3cells will read? for Class 12 2024 is part of Class 12 preparation. The Question and answers have been prepared according to the Class 12 exam syllabus. Information about Ten identical cells each of emf E and internal resistance r are connected in series to form a closed circuit. An ideal voltmeter connected across 3cells will read? covers all topics & solutions for Class 12 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Ten identical cells each of emf E and internal resistance r are connected in series to form a closed circuit. An ideal voltmeter connected across 3cells will read?.
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