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

2008 · Q134
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. /2008 · Q134

Electromagnetic Induction question

2008 · Q134

NEETPhysicsElectromagnetic InductionMCQ+4 / −1
A circular disc of radius 0.2 meter is placed in a uniform magnetic field of induction 1π(Wbm2){1 \over \pi }\left( {{{Wb} \over {{m^2}}}} \right)π1​(m2Wb​) in such a way that its axis makes an angle of 60o with B→.\overrightarrow B .B. The magnetic flux linked with the disc is
  1. A
    0.08 Wb
  2. B
    0.01 Wb
  3. C
    0.02 Wb
  4. D
    0.06 Wb
View written solutionFree

Correct answer: C

Given B = 1π(Wbm2){1 \over \pi }\left( {{{Wb} \over {{m^2}}}} \right)π1​(m2Wb​)

θ\theta θ = 60o

Area normal to the plane of the disc

= π\pi πr2 cos60o = πr22{{\pi {r^2}} \over 2}2πr2​

Flux = B × normal area

= 0.02×0.022{{0.02 \times 0.02} \over 2}20.02×0.02​ = 0.02 Wb

PreviousNext

More from Electromagnetic Induction

  • 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 is2006 · MCQ
  • 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