Find the potention difference across a resistance whose effective resistance is 10r and its current is 2a

When an object moves in uniform circular motion, the direction of its acceleration is a) in the same direction as its velocity vector. b) in the opposite direction of its velocity vector c) is directed toward the center of its circular path. d) is directed away from the center of its circular path. e) depends on the speed of the object.

How can you increase the strength of an electromagnet?

Properties seen when one one substance changes to another are known as properties