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Two charged particle, A and B each of charge +e and masses 12 a.m.u. 13 amu respectively follow a circular trajectory in chamber, X after the velocity selector as shown in the figure. Both particles enter the velocity selector with speed, 1.5×106 m s−1. A uniform magnetic field of strength, 1.0 T is maintained within the chamber, X and in the velocity selector.

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Important Questions on Magnetic Effect of Current

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Beta Question Bank for Engineering: Physics>Chapter 25 - Magnetic Effect of Current>Exercise-2>Q 40
A long straight wire, carrying current I, is bent at its midpoint to form an angle of 45∘. Magnetic field at point P, distance R from point of bending is equal to

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Beta Question Bank for Engineering: Physics>Chapter 25 - Magnetic Effect of Current>Exercise-2>Q 41
A uniform beam of positively charged particles is moving with a constant velocity parallel to another beam of negatively charged particles moving with the same velocity in opposite direction separated by a distance d. The variation of magnetic field B along a perpendicular line draw between the two beams is best represented by
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Beta Question Bank for Engineering: Physics>Chapter 25 - Magnetic Effect of Current>Exercise-2>Q 42
A coaxial cable is made up of two conductors. The inner conductor is solid and is of radius R1 and the outer conductor is hollow of inner radius R2 and outer radius R3. The space between the conductors is filled with air. The inner and outer conductors are carrying currents of equal magnitudes and in opposite directions. Then the variation of magnetic field with distance from the axis is best plotted as

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Beta Question Bank for Engineering: Physics>Chapter 25 - Magnetic Effect of Current>Exercise-2>Q 43
From a cylinder of radius R, a cylinder of radius R/2 is removed, as shown. Current  flowing in the remaining cylinder is I. Magnetic field strength is -

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Beta Question Bank for Engineering: Physics>Chapter 25 - Magnetic Effect of Current>Exercise-2>Q 44
A long straight metal rod has a very long hole of of radius 'a' drilled parallel to the rod axis as shown in the figure. If the rod carries a current 'i' find the value of magnetic induction on the axis of the hole, where OC=c

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Beta Question Bank for Engineering: Physics>Chapter 25 - Magnetic Effect of Current>Exercise-2>Q 45
Two large conducting current planes perpendicular to x-axis are placed at d, 0 and 2d, 0 as shown in figure. Current per unit width in both the planes is same and current is flowing in the outward direction. The variation of magnetic induction as function of 'x' 0≤x≤3d is best represented by -

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Beta Question Bank for Engineering: Physics>Chapter 25 - Magnetic Effect of Current>Exercise-2>Q 46
A short bar magnet placed with its axis at 30∘ with a uniform external magnetic field of 0.16 T experiences a torque of magnitude 0.032 J. The magnetic moment of the bar moment will be
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Beta Question Bank for Engineering: Physics>Chapter 25 - Magnetic Effect of Current>Exercise-2>Q 47
Two insulated rings, one of slightly smaller diameter than the other, are suspended along their common diameter as shown. Initially the planes of the rings are mutually perpendicular. When a steady current is set up in each of them.

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