Download Section Quiz: Magnets and Magnetic Fields

Section Quiz: Magnets and Magnetic Fields
Write the letter of the correct answer in the space provided.
_____ 1. Which of the following statements correctly describes the behavior of
magnets?
a. Like poles attract each other, and unlike poles repel each other.
b. Like poles repel each other, and unlike poles attract each other.
c. Both like and unlike poles can attract and repel each other depending on
the surrounding materials.
d. none of the above
_____ 6. Since more magnetic field lines cross the area that is near the pole of a
magnet, what does this indicate about the magnetic field strength in that
location?
a. It is stronger.
b. It is weaker.
c. It is entering the magnet.
d. It is leaving the magnet.
9.For each of the figures below, indicate whether the magnets will attract or repel one
another.
10. Draw magnetic field lines around the magnet below. Indicate the relative strength
of the magnetic field by drawing more lines where the magnetic field is strongest.
_____ 7. The strength of a solenoid can be increased by
a. increasing the current.
b. increasing the number of wire loops.
c. inserting an iron rod through the center of the coil.
d. all of the above
Section Quiz: Electricity from Magnetism
Write the letter of the correct answer in the space provided.
_____ 1. Under which of the following situations can a current be induced in a
circuit?
a. when an open circuit moves through a magnetic field
b. when both a closed circuit and magnetic field are moving, but not with
respect to each other
c. when neither the closed circuit nor magnetic field are moving
d. when a closed circuit moves through a magnetic field
Section Quiz: Generators, Motors, and Mutual Inductance
Write the letter of the correct answer in the space provided.
_____ 1. A generator converts
a. electrical energy into mechanical energy.
b. mechanical energy into electrical energy.
c. mechanical energy into steam.
d. steam into mechanical energy.
_____ 2. Which of the following statements best describes how a generator induces
a current?
a. The magnetic field strength is varied.
b. A wire loop is moved in and out of the magnetic field.
c. The orientation of the loop is changed with respect to the magnetic field.
d. The rotation of the loop is reversed periodically.
_____ 6. What is the name of the device that changes a small ac applied emf to a
larger one or a large applied emf to a smaller one?
a. converter
b. transformer
c. inverter
d. exchanger