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The energy stored in a magnetic field is given by ____________ where L = self-inductance and Rl=reluctance.
  • a)
    1/2 Li2
  • b)
    1/2 (mmf*Rl)2
  • c)
    1/2∅Rl
  • d)
    1/2 φ2i
Correct answer is option 'A'. Can you explain this answer?
Most Upvoted Answer
The energy stored in a magnetic field is given by ____________ where L...
Explanation:

Magnetic Energy Formula:
- The energy stored in a magnetic field is given by the formula: 1/2 Li^2, where L is the self-inductance of the circuit.

Understanding the Formula:
- The term "1/2" in the formula represents the factor of 1/2 that is commonly used in energy storage calculations.
- The term "Li^2" represents the energy stored in the magnetic field, where L is the self-inductance of the circuit and i is the current flowing through the circuit.

Importance of Self-Inductance:
- Self-inductance (L) is a measure of the ability of a circuit to store energy in its magnetic field when current flows through it.
- The greater the self-inductance of a circuit, the more energy it can store in its magnetic field.

Conclusion:
- Therefore, the correct formula for calculating the energy stored in a magnetic field is 1/2 Li^2, where L is the self-inductance of the circuit.
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Community Answer
The energy stored in a magnetic field is given by ____________ where L...
We know that Wfld = 1/2 φi and L = φ/i, thus Wfld = 1/2 Li2.
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