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If both the number of turns and core length of an inductive coil are doubled, then its self inductance will be
  • a)
    halved
  • b)
    doubled
  • c)
    quadrupled
  • d)
    unaffected
Correct answer is option 'B'. Can you explain this answer?
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Most Upvoted Answer
If both the number of turns and core length of an inductive coil are d...
CONCEPT:
Self-Induction
  • Whenever the electric current passing through a coil changes, the magnetic flux linked with it will also change.
  • As a result of this, in accordance with Faraday’s laws of electromagnetic induction, an emf is induced in the coil which opposes the change that causes it.
  • This phenomenon is called ‘self-induction’ and the emf induced is called back emf, current so produced in the coil is called induced current.
  • Self-inductance of a solenoid is given by –
⇒ 
Where μo = Absolute permeability, N = Number of turns, l = length of the solenoid, and A = Area of the solenoid.
Given - l2 = 2l1
N2 = 2 N1
Self-inductance of a solenoid is given by:
⇒ 
⇒ 
⇒
L2 = 2 L1​
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Community Answer
If both the number of turns and core length of an inductive coil are d...
CONCEPT:
Self-Induction
  • Whenever the electric current passing through a coil changes, the magnetic flux linked with it will also change.
  • As a result of this, in accordance with Faraday’s laws of electromagnetic induction, an emf is induced in the coil which opposes the change that causes it.
  • This phenomenon is called ‘self-induction’ and the emf induced is called back emf, current so produced in the coil is called induced current.
  • Self-inductance of a solenoid is given by –
⇒ 
Where μo = Absolute permeability, N = Number of turns, l = length of the solenoid, and A = Area of the solenoid.
Given - l2 = 2l1
N2 = 2 N1
Self-inductance of a solenoid is given by:
⇒ 
⇒ 
⇒
L2 = 2 L1​
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If both the number of turns and core length of an inductive coil are doubled, then its self inductance will bea)halvedb)doubledc)quadrupledd)unaffectedCorrect answer is option 'B'. Can you explain this answer?
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