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A bar magnet having a magnetic moment of `2xx10^4jt^(-1)` is free to rotate in a horizontal plane. A horizontal magnetic field `B=6xx10^(-4)` Tesla exists in the space. The work done in taking the magnet slowly from a direction parallel to the field to a direction `60^0` from the field

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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A magnet of length 0.1 m and pole strength `10^(-4)` A.m. is kept in a magnetic field of 30 tesla at an angle of `30^0` . The couple acting on it is ...................` xx10^(-4)`

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In the case of bar magnet, lines of magnetic

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A small bar magnet of moment M is placed in a uniform field of H. If magnet makes an angle of `30^0` with field, the torque acting on the magnet

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The effective length of a magnet is 31.4 cm and its pole strength is 0.5 A.m. The magnetic moment, if it is bent in the form of a semicircle will be ......................Amp.`m^2`

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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A bar magnet of length 10 cm and having the pole strength equal `00.1xx10^(-3)` to is kept in a magnetic field having magnetic induction (B) equal to `4pixx10^(-3)` tesla. It makes an angle of `30^0` with the direction of magnefic induction. The value of the torque acting on the magnet is ......................

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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A small bar magnet has a magnetic moment 1.2 A.`m^2` . The magnetic field at a distance 0.1 m on its axis will be .........................

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Biot-Savart’s law may be represented in vector form

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A circular coil of wire consisting of 100 turns, each of radius `8.0 cm` carries a current of `0.40 A`. What is the magnitude of the magnetic field B at the centre of the

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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A current `I` flows through a long straight conductor which is bent into a circular loop of radius R in the middle as shown in the figure.The magnitude of the net magnetic field at point `O` will

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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A current of 10A is flowing from east to west in a long straight wire kept on a horizontal table. The magnetic field developed at a distance of 10 cm due north on the table

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Magnetic field due to a ring having `n` turns at a distance `x` on its axis is proportional to (if, `r` = radius of

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A cylindrical conductor of radius R is carrying a constant current. The plot of the magnitude of the magnetic field B with the distance d from the centre of the conductor, is correctly represented by the

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The magnitude of the magnetic field inside a long solenoid is increased

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A long solenoid carrying a current produces a magnetic field B along its axis. If the current is doubled and the number of turns/cm is halved, the new value of the magnetic field

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The variation of magnetic field with distance d from centre of current carrying solenoid is best represented

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Toroid

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A toroid having 200 turns carries a current of 1A. The average radius of the toroid is 10 cm. The magnetic field at any point in the open space inside the toroid

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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Two toroids 1 and 2 have total number of turns 200 and 100 respectively with average radii 40 cm and 20 cm, respectively. If they carry same current `i`, the ratio of the magnetic fields along the two loops

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The current in the windings on a toroid is 2.0 A. There are 400 turns and the mean circumferential length is 40 cm. If the inside magnetic field is 1.0 T, the relative permeability is near

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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