Derive wave equation for circularly and elliptically polarised electromagnetic waves also define poynting vector​

Acup of coffee sits on the dashboard of an automobile. the car goes around a sharp curve. even though you hold the cup still, coffee still splashes out. this can best be explained due to a) density. b) friction. c) gravity. d) inertia.

How can you increase the strength of an electromagnet?

Which pair of quantities includes one quantity that increases as the other decreases during simple harmonic motion?