1-56SUMMARYThe important points of this chapter are summarized in the following summary. You should befamiliar with these points before continuing with the study of electricity.CIRCUIT MEASUREMENTis used to monitor the operation of a piece of electrical or electronicequipment and determine the reason the equipment is not functioning properly. In-circuit meters monitorthe operation of equipment and out-of-circuit meters can be used on more than one device.A compass will react to the magnetic field around a conducting wire. As the current increases, thecompass movement increases. If the current decreases, the compass movement is less. If the currentdirection changes, the compass movement changes direction. PERMANENT-MAGNETMOVING-COILmeter movement (d’Arsonval movement) uses the interaction of magnetic fields toproduce movement.
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