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4. A very long straight thin wire carries a current of 10 A. Imagine an electron...

4. A very long straight thin wire carries a current of 10 A. Imagine an electron at a location 2.0 cm from the wire and moving with a speed of 5,000 km/s.

Calculate and show the direction of the magnetic force the electron experiences,

for the following situations:

a) The electron is moving at that instant parallel with the current,

b) The electron is moving at that instant towards the wire,

c) The electron is moving at that instant perpendicular to the plane made by the

wire and the electron.

Make a clear sketch showing the current, the magnetic field and the force for each

situation.

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