A dipole consists of two point charges, each located a distance d/2 from the origin. Point P is a distance r from the origin, along the z-axis. a. Write an exact expression for the net potential at point P, assuming the reference point is at infinity. Simplify your expression into a single fraction. Show your work

Which statement correctly describes the relationship between frequency and wavelength?

Two resistors r1 and r2 may be connected either in series or parallel across an ideal battery with emf ε. we desire the rate of energy dissipation of the parallel combination to be 8.75 times that of the series combination. if r1 = 105 ω, what are the (a) smaller and (b) larger of the two values of r2 that result in that dissipation rate?

An electromagnet is a device in which moving electric chargers in a coil of wire create a magnet. whats one advantage of using electromagnetic in devices