Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
COMEDK2024Morning ShiftPhysicsMagnetic Effects of CurrentActual

A circular coil of radius 0.1 ~m is placed in the X - Y plane and a current 2 ~A is passed through the coil in the clockwise direction when looking from above. Find the magnetic dipole moment of the current loop

Options

  1. A0.02 Am ^2 in the + ve Z - direction
  2. B0.02 Am ^2 in the + ve Y - direction
  3. C0.02 Am ^2 in the -ve X - direction
  4. D0.02 Am ^2 in the - ve ~Z - direction

Correct answer

D. 0.02 Am ^2 in the - ve ~Z - direction

Step-by-step solution

The magnetic dipole moment m of a current loop is given by the formula m = I A , where I is the current and A is the area vector. The radius of the coil is r = 0.1 m . The area of the circular coil is A = r^2 = (0.1)^2 = 0.01 m ^2 . The current I = 2 A . The magnitude of the magnetic dipole moment is m = I A = 2 0.01 = 0.02 Am ^2 . The coil is placed in the X-Y plane. According to the right-hand rule, for a clockwise current when viewed from above (looking down the positive Z-axis), the direction of the area vector

Practice Magnetic Effects of Current on Quantrex Academy →

More from Magnetic Effects of Current

The current through the circular coil is halved and the radius of the coil is doubled. If B₁ and B₂ are respectively the initial and final magnetic field strength, then: 2026A circular coil of radius r = 10 ,cm having 300 turns carries a current of 2A. The coil is suspended vertically in a uniform magnetic field of strength 0.7 T. If the plane of the c 2026Two long parallel conductors X and Y are placed vertically at a distance d apart. Conductor X carries a current I upwards and conductor Y carries a current 2I downwards. A third lo 2026A proton is moving along negative X axis. If a uniform magnetic field is applied parallel to the positive Z axis, then choose the correct answer from the following options; 1. The 2026The magnetic field at the centre of a wire loop formed by two semicircular wires of radii r₁ = 3.14m and r₂ = 6.28m and carrying a current of I =2A is: 2026If a wire of length ' L ' carrying a current ' i ' is bent in the shape of a semi-circular arc as shown in the figure, then the magnetic field at centre of the arc is 2025If a current of 15 A passes through a solenoid of length 25 cm, radius 2 cm and number of turns 500, then the magnetic moment of the solenoid is 2025The maximum magnetic field produced by a current of 12 A passing through a copper wire of diameter 1.2 mm is 2025 Full Magnetic Effects of Current list All COMEDK PYQs