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16 Cards in this Set

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In a simple series circuit, why does the bulb light when you close the switch?

Because closing the switch completes the circuit.

In a simple series circuit, why does the bulb go out when you open the switch?

Because opening the switch breaks the circuit.

Imagine a simple series circuit with one 1.5V battery and one bulb. When the 1.5V battery is replaced with a 3V battery, what happens to the bulb?

The bulb glows brighter.

Imagine a circuit with a 1.5V battery and one bulb. Imagine a similar circuit with a 3V battery and two bulbs. Which has the brightest bulb(s)?

The bulbs in both circuits are of similar brightness levels.

Why might a bulb flash and go out when a 1.5V battery and a 3V battery are both connected across it in a simple series circuit?

Too much electricity flows through the bulb's filament and the bulb blows.

What is the effect of changing the wire in a circuit from a straight thick wire to a straight thin wire?

The bulbs become dimmer.

What is the effect of changing the wire in a circuit from a straight thick wire to a longer (coiled) thick wire?

The bulbs become dimmer. (Because long wire provides more resistance than short wire)

In a circuit diagram, what does a circle with a cross inside it represent?

A lightbulb.

What do the long straight lines represent in a circuit diagram?

Wires.

How is a battery represented in a circuit diagram?

A long line and a short line. (The long line represents the positive terminal of the battery; the short line, the negative terminal.)

What is the definition of electricity?

a form of energy that is carried through wires and is used to operate machines, lights, etc.: electric current or power (Merriam-Websters).

What is the definition of static electricity?

Static electricity is an imbalance of electric charges within or on the surface of a material. The charge remains until it is able to move away by means of an electric current or electrical discharge.

A(n) _________ is used to measure current, which is measured in amps.

ammeter

The rubbing together of two or more objects to create a static charge is called:

friction

Name a common material from which electrical wires are manufactured.

copper

Explain the charges of electrons, protons and neutrons.

Electrons contain a negative charge, protons a positive charge. Neutrons are neutral – they have neither a positive nor a negative charge.