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Consider the following statements regarding an inductor:
1. An inductor is a sort of short circuit to dc.
2. An inductor is a sort of open circuit to dc.
3. An inductor never dissipates energy but only stores it.
4. A finite amount of energy can be stored in an inductor even if voltage across it is zero, such as when the current through it is constant.
Q. Which of the above statements is/are not correct?
  • a)
    2 only
  • b)
    3 and 4 only
  • c)
    2 and 4 only
  • d)
    2, 3 and 4 only
Correct answer is option 'A'. Can you explain this answer?
Verified Answer
Consider the following statements regarding an inductor:1. An inductor...
An inductor acts as open circuit to dc (as f = 0 for dc so that XL = 0Ω).
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Most Upvoted Answer
Consider the following statements regarding an inductor:1. An inductor...
Explanation:
Let's analyze each statement one by one to determine their correctness.

Statement 1: An inductor is a sort of short circuit to dc.
This statement is incorrect. An inductor is a sort of open circuit to direct current (dc). The reason is that an inductor opposes changes in current, which means it resists the flow of current. When a dc voltage is applied to an inductor, it takes some time for the current to reach its maximum value due to the inductor's opposition. Therefore, an inductor behaves like an open circuit to dc.

Statement 2: An inductor is a sort of open circuit to dc.
This statement is correct. As explained in the previous statement, an inductor behaves like an open circuit to dc. It resists the flow of current and takes some time to reach its maximum value.

Statement 3: An inductor never dissipates energy but only stores it.
This statement is correct. An inductor is a passive component that stores energy in the form of a magnetic field. When current flows through an inductor, the energy is stored in the magnetic field surrounding it. When the current changes, the stored energy is released back into the circuit. However, an inductor does not dissipate energy like a resistor, which converts electrical energy into heat.

Statement 4: A finite amount of energy can be stored in an inductor even if voltage across it is zero, such as when the current through it is constant.
This statement is correct. The energy stored in an inductor is proportional to the square of the current passing through it. Even when the voltage across the inductor is zero, a finite amount of energy can still be stored in the inductor as long as the current through it is not zero. This is because the inductor's magnetic field is still present and contains energy.

Therefore, the correct answer is option 'A' - Statement 2 only.
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Consider the following statements regarding an inductor:1. An inductor is a sort of short circuit to dc.2. An inductor is a sort of open circuit to dc.3. An inductor never dissipates energy but only stores it.4. A finite amount of energy can be stored in an inductor even if voltage across it is zero, such as when the current through it is constant.Q. Which of the above statements is/are not correct?a)2 onlyb)3 and 4 onlyc)2 and 4 onlyd)2, 3 and 4 onlyCorrect answer is option 'A'. Can you explain this answer?
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