The radius of the disk is R, and the mass of the disk is M. Using the parallel axis theorem and theequation for the moment of inertia of a disk about its central axis developed in the previous example, Eq. (8), the moment of inertia of the disk about the specified axis is Fig.
Short Circuits. Short circuits are the second most common reason for breaker tripping and are a more serious concern. Short circuits occur when the black hot wires inside your electrical service panel come in contact with either other hot wires or neutral wires.
A closely related problem is accidentally letting too much current flow through part of your circuit, causing a part to burn up. This isnât quite a short circuit, but itâs close. This most often happens when you use the incorrect resistor value, which lets too much current flow through another component such as an LED.