A charge of 0.1 mC moves on the +y axis. Sunita is standing at coordinates (0, 3

Question

A charge of 0.1 mC moves on the +y axis. Sunita is standing at coordinates (0, 3, 0) measured in metres when the charge passes through the origin. At the same time, Maeve is standing at coordinates (3, 0, 0) measured in metres. Which statement is true Sunita measures zero magnetic field Maeve measures a non-zero magnetic field, since v is perpendicular to the unit vector drawn between the charge and her location. Both measure non-zero magnetic field. Both measure zero magnetic field. Sunita measures a non-zero magnetic field, since v is parallel to the unit vector drawn between the charge and her location Maeve measures zero magnetic field.

Explanation / Answer

Option (1) is the correct option.

Because magnetic field is always produced in a perpendicular plane to the direction of motion of charges. Since Sunita is on the y-axis so she is parallel to the direction of velocity of charge so she does not measure any magnetic field. On the other hand Maeve is on x-axis which is perpendicular to the direction of velocity of charge so she measures a non zero magnetic field.

(67)

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