Electrons moving in a wire are often considered to form a gas of free charges which move at random when they are not accelerated by an electric field. Ohm are connected as shown in the diagram above. A light bulb consumes 100 W of electrical power when turned on. Solving the power equation gives 24. 19. A compass needle is placed above a plane current-carrying coil a few cm in diameter.
Cosmic rays are extremely high-energy atomic nuclei which bombard the earth from outer space.
Problem 22 Problem 23 23. The current loop behaves like a dipole and will try to line up with field, as described in the text and in one of the homework problems. Using the right-hand rule, this shows that the force must be repulsive.