Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
AP EAMCET201822 Apr 2018Evening ShiftPhysicsMagnetic Properties of MatterActual

A short bar magnet of magnetic moment 0.21 ~A - m ^2 is placed with its axis perpendicular to the direction of the horizontal component of the earth's magnetic field. The distance of the point on the axis of the magnet from the centre of the magnet where the resultant magnetic field is inclined at 45^ with the horizontal component of the earth's field direction is (horizontal component of the earth's magnetic field =

Options

  1. A12 cm
  2. B20 cm
  3. C5 cm
  4. D10 cm

Correct answer

D. 10 cm

Step-by-step solution

Resultant field is inclined at 45^ to B_H , so aligned B & =B_H ₀ 4 M r^3 & =B_H r^3= M 10⁻⁷ B_H r=10 ~cm aligned

Practice Magnetic Properties of Matter on Quantrex Academy →

More from Magnetic Properties of Matter

On both sides of a magnetic needle, two short magnets A and B are placed on the same horizontal line which is perpendicular to the magnetic meridian. The south poles of A and B are 2026The material selected for making a permanent magnet should have: 2026A bar magnet of length 12 cm is placed such that its north pole points towards the geographic north. Two neutral points which are separated by 16 cm are obtained on the equatorial 2026Paramagnetic substances 2026If a paramagnetic bar is brought near a bar magnet, then it is 2026Pick out the WRONG statements about magnetic substances. ( = magnetic susceptibility) ( _r = relative permeability). I. Substances with -1 II. Substances with 1 are paramagnetic. I 2026The periodic time of a magnet in vibration magnetometer is T₀ . If a magnet is replaced by another magnet whose moment of inertia is three times and magnetic moment is one-third of 2026The frequency of oscillation of a small magnet in a magnetic field of induction 'B' is ' n '. If the frequency of oscillations of the same magnet in a field of induction 'X' falls 2026 Full Magnetic Properties of Matter list All AP EAMCET PYQs