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A bar magnet oscillates in a region of the uniform magnetic field with time period T. Now, a piece of wood identical in all respects in terms of mass and length is joined with a bar magnet as shown. The new time period of oscillation is, 

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Important Questions on Magnetism and Matter

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Gamma Question Bank for Engineering Physics>Chapter 19 - Magnetism and Matter>Assignment Set-2>Q 6
The period of oscillation of compass needle is 8 s at a place where dip angle is 30° and magnetic field is B1. At another place where dip angle is 60° and magnetic field is B2, the period of oscillation is 4 s then B2B1 is
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Gamma Question Bank for Engineering Physics>Chapter 19 - Magnetism and Matter>Assignment Set-2>Q 7
The magnitude of magnetic field, due to a dipole of magnetic moment 2.4 Am2, at a point 200 cm away from it in the direction making an angle of 90° with the dipole axis is
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Gamma Question Bank for Engineering Physics>Chapter 19 - Magnetism and Matter>Assignment Set-2>Q 8
Which of the following is correct?
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Gamma Question Bank for Engineering Physics>Chapter 19 - Magnetism and Matter>Assignment Set-2>Q 9
In tangent galvanometer generally for more accuracy deflection of galvanometer should be taken in range of
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Gamma Question Bank for Engineering Physics>Chapter 19 - Magnetism and Matter>Assignment Set-2>Q 10
In tanA position two short bar magnets of magnetic moments in the ratio of, 3 : 1 are placed at the same distance respectively. If the deflection produced for the first magnet be, 60° then what will be deflection for the second magnet?
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Gamma Question Bank for Engineering Physics>Chapter 19 - Magnetism and Matter>Assignment Set-2>Q 11
A deflection magnetometer is adjusted in the usual way. When a magnet is introduced, the deflection observed is θ=60° and the period of oscillation of the needle in magnetometer is T. When the magnet is removed the time period of oscillation is T0. The relation between T and T0 is
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Gamma Question Bank for Engineering Physics>Chapter 19 - Magnetism and Matter>Assignment Set-2>Q 12
The true value of angle of dip at a place is 60°. The apparent angle of dip, when a magnetic needle is rotated through 30° from the magnetic meridian at the same place, is
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Gamma Question Bank for Engineering Physics>Chapter 19 - Magnetism and Matter>Assignment Set-2>Q 13
In a vertical plane p1 making angle 30° with magnetic meridian, apparent angle of dip is 60°. The apparent angle of dip in vertical plane p2, which is perpendicular to plane p1 is