NEET
- Exam
- NEET
- Subject
- Physics
- Chapter
- Electromagnetic Induction
NEET · Physics · Electromagnetic Induction
Two distinct inductors store the exact same amount of magnetic...
Two distinct inductors store the exact same amount of magnetic energy. If the ratio of their inductances is , what is the ratio of the currents flowing through them?
Options
- A
- B
- C
- D
Correct answer
C.
Step-by-step solution
Let the inductances be , and the currents be .
The magnetic energy stored in an inductor is given by .
Since the energies are equal:
Rearranging for the ratio of currents:
\left(\dfrac{i_1}{i_2}\right)^2 = \dfrac{L_2}{L_1}L_1 : L_2 = 1 : 4\dfrac{L_2}{L_1} = \dfrac{4}{1}
Therefore, the ratio of the currents is .
Answer:
The magnetic energy stored in an inductor is given by .
Since the energies are equal:
Rearranging for the ratio of currents:
\left(\dfrac{i_1}{i_2}\right)^2 = \dfrac{L_2}{L_1}L_1 : L_2 = 1 : 4\dfrac{L_2}{L_1} = \dfrac{4}{1}
Therefore, the ratio of the currents is .
Answer: