The basic concept of how a simple motor works is explained by which statement?

a) when a fan blows on a wire, it causes it to spin, creating a force.
b) when a fan blows on a wire, it causes it to spin, creating an electrical current.
c) when a wire that carries electrical current is placed in zero gravity, the wire experiences a force.
d) when a wire that carries electrical current is placed in a magnetic field, the wire experiences a force.

22. the effect of threshold braking is to a cause skids. b. lock wheels. c. prevent locking of wheels. d. increase stopping distance.

Sawyer is studying diffraction. he draws a diagram of a plane wave to show how light waves travel. which best describes sawyer’s error? the wave fronts should be perpendicular to the direction in which the waves move. the arrow showing the direction of movement of the waves should be pointing to the left. the arrow showing the direction of movement of the waves should be pointing downward. the wave fronts should be both parallel and perpendicular to the direction in which the waves move.

The voltage applied across a given parallel-plate capacitor is doubled. how is the energy stored in the capacitor affected?