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The ability to do work; various forms exist such as heat, electrical, chemical, and light energy.
The soldered knob at the bottom of a bulb that must be touched in order to complete a circuit.
A device to prevent the passage of electricity often called a nonconductor; for example the glass bead which holds the support wires apart in a bulb.
The metal section of the base of a bulb, just below the glass, which must be touched in order to light the bulb.
A device designed to hold a battery and make it easier to attach wires to the battery.
One of the parts of a battery that must be connected in a closed circuit, labeled (-).
In batteries, the condition of having positive and negative ends which must be aligned correctly for the batteries to be in series or parallel.
One of the parts of a battery that must be connected in a closed circuit, labeled (+).
A complete circuit, where electricity flows from one battery terminal, through the circuit and back to the other battery terminal
A circuit through which electricity does not flow because one part is not connected; for example, a circuit in which the switch is open or a bulb is burned out.
A clear, liquid system of two or more substances which can only be separated by evaporation.
The unit of measurement to identify thickness of wire; the smaller the number, the thicker the wire.
A property of a material which describes how much it restricts the flow of eletricity. For example, Nichrome wire is more resistant than copper wire.
A wire that has a relatively high resistance and heats up as an electrical current runs through it.
When energy is changed from one form to another, for example a battery changes chemical energy to electrical energy.
An accidental connection between two points in an electrical circuit which allows electricity to follow a different path of low resistance.
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