Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
AIIMS2009PhysicsElectromagnetic Induction

A coil of wire of a certain radius has 100 turns and a self inductance of 15 mH . The self inductance of a second similar coil of 500 turns will be

Options

  1. A75 mH
  2. B375 mH
  3. C15 mH
  4. Dnone of these

Correct answer

B. 375 mH

Step-by-step solution

Inductance of a coil is given by aligned & L= 1 2 ₀ N^2 R L₂ L₁ = N₂^2 N₁^2 & L₂=L₁ N₂^2 N₁^2 = ( 500 100 )^2 15 mH =375 mH aligned

Practice Electromagnetic Induction on Quantrex Academy →

More from Electromagnetic Induction

A square loop of area A is moving out of the uniform magnetic field (B) with constant velocity v . The EMF (e) induced in the loop is 2026The value of mutual inductance of two coils is 6 mH. The current in one of the coil changes from 7 A to 2 A in 0.2 second, so that e.m.f. is induced in the other coil. If the resis 2026Two identical inductors are connected in parallel. If the parallel combination stores 40 J of magnetic field energy when a total current of 2 A is passed through it, the value of t 2026Two coils have mutual inductance of 0.004 H . The current changes in the first coil according to the relation i = i₀ t , where i₀ = 6 A and = 100 rad/s . The maximum value of emf i 2026The coefficient of coupling is 0.8 . If the mutual inductance is 8 H , then the values of self-inductances L₁ and L₂ of the coil are 2026The self inductance L of a solenoid of length l and area of cross-section A, with a fixed number of turns N increases as 2026A wire of length 1 m is moving at a speed of 2 m/s perpendicular to its length in a homogeneous magnetic field of 0.5 T . If the ends of the wire are joined to a circuit of resista 2026Semicircular wire of radius R is rotated in a uniform magnetic field about an axis passing through its ends. If the frequency of rotation is f, the amplitude of induced e.m.f. in t 2026 Full Electromagnetic Induction list All AIIMS PYQs