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

Magnetics question

2022 · 24 Jun · Shift 1 · Q60
Guest · try one question or challengeGuest · try one question or challenge
  1. PYQ Library
  2. /JEE Main
  3. /Physics
  4. /Magnetics
  5. /2022 · 24 Jun · Shift 1 · Q60

Magnetics question

2022 · 24 Jun · Shift 1 · Q60

JEE MainPhysicsMagneticsMCQ+4 / −1
The magnetic field at the centre of a circular coil of radius r, due to current I flowing through it, is B. The magnetic field at a point along the axis at a distance r2{r \over 2}2r​ from the centre is :
  1. A
    B/2
  2. B
    2B
  3. C
    (25)3B{\left( {{2 \over {\sqrt 5 }}} \right)^3}B(5​2​)3B
  4. D
    (23)3B{\left( {{2 \over {\sqrt 3}}} \right)^3}B(3​2​)3B
PreviousNext

More from Magnetics

  • A proton, a deutron and an α-particle with same kinetic energy enter into a uniform magnetic field at right angle to magnetic field. The ratio of the radii of their respective circular paths is :2022 · MCQ
  • Two charged particles, having same kinetic energy, are allowed to pass through a uniform magnetic field perpendicular to the direction of motion. If the ratio of radii of their circular paths is 6:5 and their respective masses ratio is 9:4…2022 · MCQ
  • A long straight wire with a circular cross-section having radius R, is carrying a steady current I. The current I is uniformly distributed across this cross-section. Then the variation of magnetic field due to current I with distance r (r…2022 · MCQ
  • A long solenoid carrying a current produces a magnetic field B along its axis. If the current is doubled and the number of turns per cm is halved, the new value of magnetic field will be equal to2022 · MCQ
  • A charge particle is moving in a uniform magnetic field (2i^+3j^​)T. If it has an acceleration of (αi^−4j^​)m/s2, then the value of α will be :2022 · MCQ
  • BX​ and BY​ are the magnetic fields at the centre of two coils X and Y respectively each carrying equal current. If coil X has 200 turns and 20 cm radius and coil Y…2022 · MCQ
  • Two concentric circular loops of radii r1​=30 cm and r2​=50 cm are placed in X−Y plane as shown in the figure. A current I=7 A is flowing through them in the direction as shown in… Includes diagram2022 · MCQ
  • A proton and an alpha particle of the same velocity enter in a uniform magnetic field which is acting perpendicular to their direction of motion. The ratio of the radii of the circular paths described by the alpha particle and proton is :2022 · MCQ