Determine the direction of the force that will act on the charge in each of the following situations. A negative charge moving to the left in a magnetic field that points into the screen. A negative charge moving to the right in an electric field that points out of the screen. A positive charge moving into the screen in a magnetic field that points into the screen.

a) Upwards

b) Downwards

c) The force is zero

Explanation:

According to Fleming's Right Hand Rule, " If the right hand is held with the thumb, fore finger and middle finger mutually perpendicular to each other (at right angles), the thumb is pointed in the direction of the motion of the conductor relative to the magnetic field, the fore finger is pointed in the direction of the magnetic field. (north to south) , then the middle finger represents the direction of the induced electromotive force or generated current within the conductor.

NB: for positive charges, the force points in the magnetic field's direction while for negative charges, the force points opposite to the magnetic field

a) The direction of the force for a negative charge moving to the left in a magnetic field that points into the screen will be Upwards

b) For a negative charge  moving to the right in an electric field that points out of the screen, the direction of the force will be downwards

c) for a positive charge moving into the screen in a magnetic field that points into the screen, there will be no magnetic force because the motion is in the same direction with the field

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