Charged particles

Magnetic field lines are continuous, forming closed loops without beginning or end. They go from the .................pole to the ............... pole.

Electric field lines originate on .................... charges and end on ......................... charges

If the parallel plates of the capacitors are separated by a very tiny distance, the electric field can be made ..................................

Magnetic fields arise from ................... magnets and electric charges in ..........................

A solenoid produces a .......................... ..............................when an electric current is passed through it.

How do the directions of the magnetic field lines about a current-carrying wire shown?

• They are directed away from the wire in all directions.

   

•      They are parallel to the wire and similar to the direction of the current.

   

•      They form a pattern of concentric circles around the wire.

   

• They are parallel to the wire but opposite to the direction of the current.

   

Using the Right-Hand-Rule configuration, if the thumb points to the direction of the force, what are the directions of the index and middle fingers respectively?

•   Magnetic field and motion of the positive charge

•   Motion of the positive charge and magnetic field

• Motion of the negative charge and magnetic field

• Magnetic field and electric field

What happens to the direction of the magnetic field about an electric current when the direction of the current is reversed?

• It stays the same.

• It becomes parallel to the current-carrying wire.

• It points away from the current-carrying wire.

• It becomes reversed.

  If a wire carries a certain amount of current, how can the magnetic field strength be increased due to this current?

•   by allowing the current to alternate its direction periodically

• by making multiple loops out of this wire

•    by increasing the length of the wire

• by placing the wire in a vacuum

In what direction relative to the magnetic field does a charged particle move in order to experience a maximum deflecting force?

• It should be moving parallel to the magnetic field but opposite in direction.

• It should be moving perpendicular to the magnetic field.

•   It should be moving parallel to the magnetic field and in the same direction.

• It should be stationary and within the region of the magnetic field.