A charge of the magnitude of 0.5 μC moving in a uniform magnetic field with a speed of 4.0×106 m/s experiences a force of 0.25 N when the angle between the magnetic field and the velocity is 30°.    (a) Determine the magnitude of the magnetic field   (b) If a circular coil of 20 turns with an area of 3 cm2 is placed in this field and making an angle of 60° with the magnetic field, calculate the magnetic flux through the coil

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A: Bartleby's guidelines allowing answer only the first three subparts

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