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In an L-R circuit, the value of L is (0.4/π) henry and the value of R is 30 ohm. If in the circuit, an alternating emf of 200 volt at 50 cycles per second is connected, the impedance of the circuit and current will be
  • a)
    11.4 ohm,17.5 ampere
  • b)
    30.7 ohm,6.5 ampere
  • c)
    40.4 ohm,5 ampere
  • d)
    50 ohm, 4 ampere
Correct answer is option 'D'. Can you explain this answer?
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In an L-R circuit, the value of L is (0.4/π) henry and the value of...

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In an L-R circuit, the value of L is (0.4/π) henry and the value of...
Impedance Calculation:
- Impedance, Z = √(R² + (ωL)²)
- Given values: R = 30 ohm, L = 0.4/π H, ω = 2πf = 2π*50 = 100π rad/s
- Z = √(30² + (100π*0.4/π)²)
- Z = √(900 + 1600) = √2500 = 50 ohm

Current Calculation:
- Current, I = V/Z
- Given values: V = 200V, Z = 50 ohm
- I = 200/50 = 4 ampere
Therefore, the impedance of the circuit is 50 ohm and the current flowing through the circuit is 4 ampere. Hence, the correct answer is option 'D'.
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In an L-R circuit, the value of L is (0.4/π) henry and the value of R is 30 ohm. If in the circuit, an alternating emf of 200 volt at 50 cycles per second is connected, the impedance of the circuit and current will bea)11.4 ohm,17.5 ampereb)30.7 ohm,6.5 amperec)40.4 ohm,5 ampered)50 ohm, 4 ampereCorrect answer is option 'D'. Can you explain this answer?
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In an L-R circuit, the value of L is (0.4/π) henry and the value of R is 30 ohm. If in the circuit, an alternating emf of 200 volt at 50 cycles per second is connected, the impedance of the circuit and current will bea)11.4 ohm,17.5 ampereb)30.7 ohm,6.5 amperec)40.4 ohm,5 ampered)50 ohm, 4 ampereCorrect answer is option 'D'. Can you explain this answer? for JEE 2025 is part of JEE preparation. The Question and answers have been prepared according to the JEE exam syllabus. Information about In an L-R circuit, the value of L is (0.4/π) henry and the value of R is 30 ohm. If in the circuit, an alternating emf of 200 volt at 50 cycles per second is connected, the impedance of the circuit and current will bea)11.4 ohm,17.5 ampereb)30.7 ohm,6.5 amperec)40.4 ohm,5 ampered)50 ohm, 4 ampereCorrect answer is option 'D'. Can you explain this answer? covers all topics & solutions for JEE 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for In an L-R circuit, the value of L is (0.4/π) henry and the value of R is 30 ohm. If in the circuit, an alternating emf of 200 volt at 50 cycles per second is connected, the impedance of the circuit and current will bea)11.4 ohm,17.5 ampereb)30.7 ohm,6.5 amperec)40.4 ohm,5 ampered)50 ohm, 4 ampereCorrect answer is option 'D'. Can you explain this answer?.
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