Suppose you have two identical-looking sticks, each with exactly the same total mass. In one stick, most of the mass is located at its ends. In the other stick, most of the mass is located at the middle. There is a loud thump sound. A toy top spins for a long time on its point.
Copper is a nonmagnetic metal.
A current loses energy as it flows through a wire. Let s examine why. To begin with, suppose that only a lamp is plugged into the outlet in your room and that the lamp is turned on. Between the point at which this current leaves the power lines for your home and the point at which it returns to the power lines from your home, it experiences a voltage drop of 120 volts. You plug a hairdryer into the other socket of the same electric outlet and turn it on.