Doubts
Sign in
12thPass logo
New chatPYQ LibraryDoubtsRank report
Sign in to see Recents
Sign in to save progress →
Doubts
Sign in

Electromagnetic Induction question

2020 · 9 Jan · Shift 1 · Q43
Guest · try one question or challengeGuest · try one question or challenge
  1. PYQ Library
  2. /JEE Main
  3. /Physics
  4. /Electromagnetic Induction
  5. /2020 · 9 Jan · Shift 1 · Q43

Electromagnetic Induction question

2020 · 9 Jan · Shift 1 · Q43

JEE MainPhysicsElectromagnetic InductionNumerical+4 / −1
In a fluorescent lamp choke (a small transformer) 100 V of reverse voltage is produced when the choke current changes uniformly from 0.25 A to 0 in a duration of 0.025 ms. The self-inductance of the choke (in mH) is estimated to be ‾\underline{\hspace{2cm}}​.
Numerical answer
PreviousNext

More from Electromagnetic Induction

  • A 20 Henry inductor coil is connected to a 10 ohm resistance in series as shown in figure. The time at which rate of dissipation of energy (joule's heat) across resistance is equal to the rate at which magnetic energy is stored in the… Includes diagram2019 · MCQ
  • The total number of turns and cross-section area in a solenoid is fixed. However, its length L is varied by adjusting the separation between windings. The inductance of solenoid will be proportional to :2019 · MCQ
  • A very long solenoid of radius R is carrying current I(t) = kte–at(k > 0), as a function of time (t ≥ 0). counter clockwise current is taken to be positive. A circular conducting coil of radius 2R is placed in the equatorial plane…2019 · MCQ
  • Two coils 'P' and 'Q' are separated by some distance. When a current of 3 A flows through coil 'P', a magnetic flux of 10–3 Wb passes through 'Q'. No current is passed through 'Q'. When no current passes through 'P' and a current of 2 A…2019 · MCQ
  • A conducting circular loop made of a thin wire, has area 3.5 × 10 − 3 m2 and resistance 10 Ω. It is placed perpendicular to a time dependent magnetic field B(t) = (0.4T)sin(50 π t). The field is uniform in space. Then…2019 · MCQ
  • A solid metal cube of edge length 2 cm is moving in a positive y-direction at a constant speed of 6 m/s. There is a uniform magnetic field of 0.1 T in the positive z-direction. The potential difference between the two faces of the cube…2019 · MCQ
  • The self induced emf of a coil is 25 volts. When the current in it is changed at uniform rate from 10 A to 25 A in 1s, the change in the energy of the inductance is -2019 · MCQ
  • There are two long co-axial solenoids of same length l. The inner and outer coils have radii r1 and r2 and number of turns per unit length n1 and n2, respectively. The ratio of mutual inductance to the self - inductance of the inner-coil…2019 · MCQ