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

2013 · Q129
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. /2013 · Q129

Electromagnetic Induction question

2013 · Q129

NEETPhysicsElectromagnetic InductionMCQ+4 / −1
A wire loop is rotated in a magnetic field. The frequency of change of direction of the induced e.m.f. is
  1. A
    four times per revoluation
  2. B
    six times per revolution
  3. C
    once per revolution
  4. D
    twice per revolution
View written solutionFree

Correct answer: D

This is the case of periodic EMI

NEET 2013 Physics - Electromagnetic Induction Question 23 English Explanation


From graph, it is clear that direction is changing twice in 1 cycle.

PreviousNext

More from Electromagnetic Induction

  • In a coil of resistance 10 Ω, the induced current developed by changing magnetic flux through it, is shown in figure as a function of time. The magnitude of change in flux through the coil in weber is Includes diagram2012 · MCQ
  • A coil of resistance 400 Ω is placed in a magnetic field. If the magnetic flux ϕ (Wb) linked with the coil varies with time t (sec) as ϕ=50t2+4. The current in the coil at t = 2 sec is2012 · MCQ
  • The current i in a coil varies with time as shown in the figure. The variation of induced emf with time would be Includes diagram2011 · MCQ
  • A conducting circular loop is placed in a uniform magnetic field, B = 0.025 T with its plane perpendicular to the loop. The radius of the loop is made to shrink at a constant rate of 1 mm s−1. The induced emf when the radius is 2 cm, is2010 · MCQ
  • A rectangular, a square, a circular and an elliptical loop, all in the (x-y) plane, are moving out of a uniform magnetic field with a constant velocity. V=vi. The magnetic field is directed along the negative…2009 · MCQ
  • A conducting circular loop is placed in a uniform magnetic field 0.04 T with its plane perpendicular to the magnetic field. The radius of the loop starts shrinking at 2 mm/s. The induced emf in the loop when the radius is 2 cm is2009 · MCQ
  • A long solenoid has 500 turns. When a current of 2 ampere is passed through it, the resulting magnetic flux linked with each turn of the solenoid is 4 × 10−3 Wb. The self-inductance of the solenoid is2008 · MCQ
  • A circular disc of radius 0.2 meter is placed in a uniform magnetic field of induction π1​(m2Wb​) in such a way that its axis makes an angle of 60o with B. The magnetic flux…2008 · MCQ