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Electromagnetism

Q- An electron is moving straight towards a long straight wire with a velocity of 2*107 m/s. When the electron is 6 cm from the wire, a current I = 12 A suddenly appears in the wire. Find

(a) The magnitude and direction of the of the magnetic field of this current at the position of the electron.

(b) The magnitude and direction of the magnetic force on the electron at this instant. 

Solution:

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