| True / False |
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In order for current electricity to flow, electrons need a good conductor to allow them to move.
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In a typical household wire, the metal interior (ie. copper) is a good conductor and the coating (ie. plastic) is an insulator.
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The stored energy in a battery is called "Kinetic Energy".
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When a battery is connected in a circuit, electrons leave from the positive terminal of the battery, travel around the circuit, and re-enter the battery at the negative terminal.
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An ammeter is used to measure the current in a circuit.
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| True / False |
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The correct equation for calculating current is:
I = Q x t
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The correct units for current are joules per coulomb.
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The current in a simple series circuit is the same in all parts of the circuit.
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Typically, a 6 V bulb has a larger filament diameter than a 14 V bulb.
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When connected to a 1.5 V dry cell, a 2 V bulb will shine brighter than a 3 V bulb.
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| True / False |
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The correct equation for calculating voltage is:
V = E/Q
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When measuring the voltage of a battery, the negative terminal of the voltmeter should be connected to the positive terminal of the battery.
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A 12 V battery gives 12 joules of energy to every ampere of charge.
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A dry cell is made from a number of batteries connected in series or parallel.
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When dry cells are connected in parallel the total voltage stays the same but when they are connected in series the total voltage increases.
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| True / False |
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When two 1.5 V dry cells are connected in series, the total voltage is 3.0 V.
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Resistors are used to decrease the voltage in a circuit.
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The correct equation for calculating resistance is:
R = V/I
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The correct units for resistance are volts per ampere (or ohms).
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When an electric current is passed through a coiled wire, a magnetic field is produced that is perpendicular to the direction of the current.
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