ASSESSMENT ON GENERATOR
Direction: Choose the letter of the best answer. Write the chosen letter on a separate sheet of
paper.
1. In what way is a DC generator different from an AC generator?
A. The DC generator is operated by an applied voltage
B. A DC generator follow Faraday’s law while an AC generator works
according to Lenz’s law
C. A DC generator creates an electric current that flows in one direction while the
current produced in an AC generator flows in two direction alternately
D. A DC generator creates an electric current that flows in a definite direction while
the flow of current produced in an AC generator has no definite direction.
2. A generator converts
into
.
A. Electrical energy; mechanical energy
B. Electromagnetic induction; electrical energy
C. AC; DC
D. Mechanical; electrical
3. All of the following are true about the strength of the magnetic field except _.
A. Induced voltage is greater when the magnetic field is stronger.
B. The strength of magnetic field increases as the number of loops of wire is
increased
C. The strength of magnetic field is independent of the speed of the rotation of
the coil
D. An increase in magnetic field yields more number of line of force cut by the loops of
conducting wire.
4. Electromagnetic induction was discovered by
A. Thomas Edison
B. Nikola Tesla
C. Benjamin Franklin
D. Michael Faraday
5. When the rate of motion of the same coil of wire is increased through the same
magnetic field, the wire will move across the magnetic lines .
A. faster, producing less induced current
B. slower, producing less induced current
C. faster, producing more induced current
D. slower, producing more induced current
6. What basic principle enables ALL electric generators to operate?
A. A closed-loop conductor within a changing magnetic field will have an induced
electromotive force.
B. A current-carrying conductor placedwithina magnetic fieldwill experience a magnetic
force.
C. Iron is the only element that is magnetic.
D. Opposite electric charges attract and like charges repel.
7. The greater the number of loops in the coil of wire, the .
A. greater is the amount of heat produced
B. smaller the magnetic field around the wire
C. greater is the amount of induced voltage produced.
D. greater is the amount of friction which results in lower induced voltage.
8. In large generators in power plants rotate inside a coil of wire to produce an electric current.
A. Wind
B. Water
C. Magnets
