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Two short magnets of equal dipole moments M are fastened perpendicularly at their centres as shown below (point P is in the plane of the magnets)

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The magnetic field (magnitude) at P, distance d from the centre on the bisector of the right angle is

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Important Questions on Magnetism and Matter

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Gamma Question Bank for Medical Physics>Chapter 20 - Magnetism and Matter>Assignment Set-2>Q 11
A magnetic needle lying parallel to magnetic field requires W units of work to turn it through 60°. The torque needed to maintain the needle in this position will be
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Gamma Question Bank for Medical Physics>Chapter 20 - Magnetism and Matter>Assignment Set-2>Q 12
Potential energy of a bar magnet of magnetic moment M placed in a magnetic field of induction B such that it makes an angle θ with the direction of B is
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Gamma Question Bank for Medical Physics>Chapter 20 - Magnetism and Matter>Assignment Set-2>Q 13
A magnetic dipole is placed at right angles to the direction of magnetic induction B. If it is rotated through an angle of 180°, then the work done is
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Gamma Question Bank for Medical Physics>Chapter 20 - Magnetism and Matter>Assignment Set-2>Q 14
Which of the following statements regarding magnetic lines of force is correct?
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Gamma Question Bank for Medical Physics>Chapter 20 - Magnetism and Matter>Assignment Set-2>Q 15
The time period of a freely suspended magnet is 4 s. If it is broken in length into two equal parts and one part is suspended in the same way, then its time period will be
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Gamma Question Bank for Medical Physics>Chapter 20 - Magnetism and Matter>Assignment Set-2>Q 16
The magnetic moments of two bar magnets of same size are in the ratio 1:2. When they are placed one over the other with their similar poles together, then their period of oscillation in a magnetic field is 3 s. If one of the magnets is reversed, then the period of oscillation in the same field will be
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Gamma Question Bank for Medical Physics>Chapter 20 - Magnetism and Matter>Assignment Set-2>Q 17
Magnetostatic screening or shielding can be created by
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Gamma Question Bank for Medical Physics>Chapter 20 - Magnetism and Matter>Assignment Set-2>Q 18
Planets producing larger magnetic field have larger