Two parallel wires carry equal currents in the opposite directions. point a is midway between the wires, and b is an equal distance on the other side of the wires. what is the ratio of the magnitude of the magnetic field at point a to that at point b?

Wavelength,frequency,and energy are related.what happens to a wave as it’s wavelength gets shorter?

Greg drew a diagram to compare two of the fundamental forces. which labels belong in the areas marked x, y and z? gravitational force electromagnetic force x. attractive y repulsive z: infinite range x: infinite range y attractive z. repulsive x. always attractive y: infinite range z: attractive or repulsive x. attractive or repulsive y infinite range z: always attractive

Which of the following is the largest disadvantage of about half of the electricity in the united states comes from burning