PHY_10_65_V2_DM_Electromagnetic devices

Worksheet

Electricity Magnetism  Test Review

Modified True/False  Indicate whether the statement is true or false. If false, change the identified word or phrase to make the statement true.

            1.   A conductor is a material that doesn't allow electrons to flow through it easily. _________________________

            2.   A lightning bolt occurs when billions of protons are transferred at the same time. _________________________

            3.   The rearrangement of electrons on a neutral object caused by a nearby charged object is called charging by induction. _________________________

            4.   Voltage difference is measured in amperes. _________________________

            5.   The unit used to measure current is the volt. _________________________

Multiple Choice  Identify the choice that best completes the statement or answers the question.

            6.   Which of the following is a device designed to open an overloaded circuit and prevent overheating?

            7.   Current that does NOT reverse direction is called ____.

            8.   The location of the strongest magnetic forces is the ____.

            9.   Current that reverses direction in a regular pattern is called ____.

          10.   The region around a magnet where the magnetic forces act is the ____.

          11.   Objects that keep their magnetic properties for a long time are called ____.

          12.   The function of an electric motor is to change ____.

          13.   The function of a generator is to change ____.

          14.   The current that flows in an electric circuit carries ____.

          15.   There is a repulsive force between two charged objects when

          16.   There is an attractive force between two charged objects when

          17.   Which of the compass needle orientations in the figure above might correctly describe the magnet’s field at that point?

Matching

Match each term with the correct statement below.

____  18.   contains a piece of metal that melts if the current becomes too high

____  19.   allows electrons to move through it easily

____  20.   contains a piece of metal that bends when it gets hot

____  21.   detects the presence of electric charges

____  22.   does not allow electrons to move through it easily

Completion   Complete each statement.

Figure 7-1

          23.   In Figure 7-1, circuit ____________________ is wired in series.

          24.   In Figure 7-1, circuit ____________________ is wired in parallel.

          25.   In Figure 7-1, circuit ____________________ represents the way that homes are usually wired.

          26.   In Figure 7-1, circuit ____________________ is the type of circuit that causes an entire string of decorative lights to go out when one of the bulbs burns out.

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