The resistance of a conductor is directly proportional to which of the following quantities? length, cross-sectional area, charge, potential

To create electromagnetic induction, which of the following has to move? a. a wire b. a magnet c. a transformer d. either a or b

Consider two metallic rods mounted on insulated supports. one is neutral, the other positively charged. you bring the two rods close to each, but without contact, and briefly ground the the neutral rod by touching it with your hand. show answer correct answer what would be resulting charge (if any) on the initially neutral rod

The speed of light in a material is 0.50 c. what is the critical angle of a light ray at the interface between the material and a vacuum?