Basic Electricity Worksheet
Determine if the light bulb will de-energize for each of the following breaks in the circuit. Consider just one break at a time:
- • Choose one option for each point:
- • A: de-energize / no effect
- • B: de-energize / no effect
- • C: de-energize / no effect
- • D: de-energize / no effect
- • E: de-energize / no effect
- • F: de-energize / no effect
Shown here is a simplified representation of an atom: the smallest division of matter that may be isolated through physical or chemical methods.
Inside of each atom are several smaller bits of matter called particles. Identify the three different types of “elementary” particles inside an atom, their electrical properties, and their respective locations within the atom.
Of the three types of “elementary particles” constituting atoms, determine which type(s) influence the following properties of an element:
- • The chemical identity of the atoms (whether it is an atom of nitrogen, iron, silver, or some other element).
- • The mass of the atom.
- • The electrical charge of the atom.
- • Whether or not it is radioactive (spontaneous disintegration of the nucleus).
Suppose you are building a cabin far away from electric power service, but you desire to have electricity available to energize light bulbs, a radio, a computer, and other useful devices. Determine at least three different ways you could generate electrical power to supply the electric power needs at this cabin.
Where does the electricity come from that powers your home, or your school, or the streetlights along roads, or the many business establishments in your city? You will find that there are many different sources and types of sources of electrical power. In each case, try to determine where the ultimate source of that energy is.
For example, in a hydroelectric dam, the electricity is generated when falling water spins a turbine, which turns an electromechanical generator. But what continually drives the water to its “uphill” location so that the process is continuous? What is the ultimate source of energy that is being harnessed by the dam?
A 22-gauge metal wire three feet in length contains approximately 28.96 ×1021 “free” electrons within its volume. Suppose this wire is placed in an electric circuit conducting a current equal to 6.25 ×1018 electrons per second. That is, if you were able to choose a spot along the length of this wire and were able to count electrons as they drifted by that spot, you would tally 6,250,000,000,000,000,000 electrons passing by each second. (This is a reasonable rate for electric current in a wire of this size.)
Calculate the average velocity of electrons through this wire.
Shown here is a simplified representation of an electrical power plant and a house, with the source of electricity shown as a battery, and the only electrical “load” in the house being a single light bulb:
Why would anyone use two wires to conduct electricity from a power plant to a house, as shown, when they could simply use one wire and a pair of ground connections, like this?
When lightning strikes, nearby magnetic compass needles may be seen to jerk in response to the electrical discharge. No compass needle deflection results during the accumulation of electrostatic charge preceding the lightning bolt, but only when the bolt actually strikes. What does this phenomenon indicate about voltage, current, and magnetism?
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