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

Magnetics question

2007 · Shift 0 · Q74
Guest · try one question or challengeGuest · try one question or challenge
  1. PYQ Library
  2. /JEE Main
  3. /Physics
  4. /Magnetics
  5. /2007 · Shift 0 · Q74

Magnetics question

2007 · Shift 0 · Q74

JEE MainPhysicsMagneticsMCQ+4 / −1
A long straight wire of radius aaa carries a steady current i.i.i. The current is uniformly distributed across its cross section. The ratio of the magnetic field at a/2a/2a/2 and 2a2a2a is
  1. A
    1/21/21/2
  2. B
    1/41/41/4
  3. C
    444
  4. D
    111
PreviousNext

More from Magnetics

  • A current I flows along the length of an infinitely long, straight, thin walled pipe. Then2007 · MCQ
  • A charged particle with charge q enters a region of constant, uniform and mutually orthogonal fields E and B with a velocity v perpendicular to both E and B,…2007 · MCQ
  • In a region, steady and uniform electric and magnetic fields are present. These two fields are parallel to each other. A charged particle is released from rest in this region. The path of the particle will be a2006 · MCQ
  • A long solenoid has 200 turns per cm and carries a current i. The magnetic field at its center is 6.28×10−2Weber/m2. Another long solenoid has 100 turns per cm and it carries a current 3i​. The…2006 · MCQ
  • Two concentric coils each of radius equal to 2πcm are placed at right angles to each other. 3 ampere and 4 ampere are the currents flowing in each coil respectively . The magnetic induction in Weber /m2 at the center of the…2005 · MCQ
  • A uniform electric field and a uniform magnetic field are acting along the same direction in a certain region. If an electron is projected along the direction of the fields with a certain velocity then2005 · MCQ
  • A charged particle of mass m and charge q travels on a circular path of radius r that is perpendicular to a magnetic field B. The time taken by the particle to complete one revolution is2005 · MCQ
  • Two thin, long, parallel wires, separated by a distance ′d′ carry a current of ′i′A in the same direction. They will2005 · MCQ