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An electromagnet can be switched on and off - And advantage of an electromagnet over a permanent magnet is Scatters light uniformly in all directions - An excellent diffuser surface is one that In a photovoltaic cell - Light is converted into electricity Armature - The rotating part of a DC motor is known as Fish tape - A device used to pull wires through a conduit is called Approximately zero - In making a resistance test, remember that the resistance of a short circuit is Parallel - To increase current capacity, battery cells are connected in 10 - The hot resistance of an incandescent lamp is approximately how many times it's cold resistance Start measuring at the highest range - The proper way of measuring and unknown voltage with a multi-tester is to A charge - A capacitor stores what? Paper - What has the lowest dielectric strength Knife - A form of air switch in which the moving element is a hinged blade wedge between stationary contact blades when closed is a what switch