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8. In a magnetic field, a compass will point A) in the direction of the current C) perpendicular to the magnetic field B) in the direction of the magnetic field D) perpendicular to the direction of the current. 9. A current-carrying wire in a magnetic field experiences a force because A) the wire is motionless B) the wire acts like a compass C) charges in the wire are moving D) a magnetic force always acts on metal in a wire 10. Faradays law of induction essentially states that if the through the cross-sectional area of a closed loop is changing, an EMF will be generated in the loop. A) magnetic flux B) electric flux C) electric field D) magnetic field 11. The statement: "an induced current flows in the direction that opposes the change that caused the current" is known as Law. A) Faraday's B) Lenz's C) Ampere's D) Gauss' 12. When an antenna produces electromagnetic waves, the electric field part of the wave is generated by the separation of charge on the antenna, the magnetic field part of the wave is created by the A) frequency of charge separation and reversal B) the motion of charge on the antenna C) the magnetic flux through a cylindrical surface surrounding the antenna D) none of these