Sign in
12thPass logo
New chatPYQ LibraryDoubtsRank report
Sign in to see Recents

Your guest activity stays on this device

Sign in to save progress →
Sign in

Electromagnetic Induction question

2006 · Q138
Guest · filters and generic practice availableBrowsing as a guest · PYQ filters and generic practice are available. Sign in only for personalised features and saved progress.
  1. PYQ Library
  2. /NEET
  3. /Physics
  4. /Electromagnetic Induction
  5. /2006 · Q138

Electromagnetic Induction question

2006 · Q138

NEETPhysicsElectromagnetic InductionMCQ+4 / −1
Two coils of self inductance 2 mH and 8 mH are placed so close together that the effective flux in one coil is completely linked with the other. The mutual inductance between these coils is
  1. A
    16 mH
  2. B
    10 mH
  3. C
    6 mH
  4. D
    4 mH
View written solutionFree

Correct answer: D

Mutual inductance is given as,

M = KL1×L2\sqrt {{L_1} \times {L_2}} L1​×L2​​

Now given, K = 1, L1 = 2 mH, L2 = 8 mH

∴\therefore∴ M = 1×2×81 \times \sqrt {2 \times 8} 1×2×8​ = 4 mH

PreviousNext

More from Electromagnetic Induction

  • As a result of change in the magnetic flux linked to the closed loop as shown in the figure, an e.m.f. V volt is induced in the loop. The work done (joule) in taking a charge Q coulomb once along the loop is Includes diagram2005 · MCQ
  • The magnetic flux through a circuit of resistance R changes by an amount Δϕ in a time Δt. Then the total quantity of electric charge Q that passes any point in the circuit during the time Δt is represented by2004 · MCQ
  • For a coil having L = 2 mH, current flow through it is I=t2e−t then, the time at which emf become zero2001 · MCQ
  • AB is a part of an electrical circuit (see figure). The potential difference " VA​−VB​ ", at the instant when current i=2 A and is increasing at a rate of 1amp/ second is: Includes diagram2025 · MCQ
  • Let us consider two solenoids A and B, made from same magnetic material of relative permeability μr​ and equal area of cross-section. Length of A is twice that of B and the number of turns per unit length in A is half that of…2024 · MCQ
  • An emf is generated by an ac generator having 100 turn coil, of loop area 1 m2. The coil rotates at a speed of one revolution per second and placed in a uniform magnetic field of 0.05 T perpendicular to the axis of…2023 · MCQ
  • The net magnetic flux through any closed surface is :2023 · MCQ
  • The magnetic flux linked to a circular coil of radius R is ϕ=2t3+4t2+2t+5 Wb The magnitude of induced emf in the coil at t = 5 s is2022 · MCQ