Section 26.2
Electric and Magnetic Fields in Space
Practice Test
1.
What occurs in a material that has the property of piezoelectricity?
a.
It produces a beam of light when it enters a magnetic field.
b.
It amplifies sound waves.
c.
It bends or deforms when a voltage is applied across it.
d.
It emits infrared radiation.
Hint
2.
Combined electric and magnetic fields that move through space are called __________.
a.
oscillating fields
b.
radiation waves
c.
electromagnetic waves
d.
piezoelectric fields
Hint
3.
Energy carried in the form of electromagnetic waves is frequently called __________.
a.
electromotive force
b.
terminal energy
c.
oscillating rays
d.
electromagnetic radiation
Hint
4.
A receiver is a combination of ____________.
a.
an antenna, a capacitor circuit, and a resonator
b.
an antenna and an amplifier
c.
an antenna, a coil and capacitor circuit, and an amplifier
d.
a coil and capacitor circuit
Hint
5.
An alternating current source produces changing currents in a wire connected to it. This wire generates electromagnetic fields. What is this wire called?
a.
a capacitor
b.
an oscillator
c.
a polarizer
d.
an antenna
Hint
6.
The radio waves reflected by a parabolic dish are 4.0 cm long. How long should the antenna be that detects the waves?
a.
2.0 m
b.
2.5 cm
c.
2.0 cm
d.
1.0 cm
Hint
7.
The oscillations of a coil and capacitor circuit can be compared to a _________.
a.
ship in orbit
b.
parabolic path of a ball
c.
merry-go-round
d.
pendulum
Hint
