Electromagnetism
Practice Test
1.
Protons passing perpendicular to and without deflection through a uniform magnetic field of 0.54 T are balanced by a 5.4×10
3
-N/C electric field. What is the speed of the moving protons?
a.
1.0×10
-4
m/s
b.
9.0×10
3
m/s
c.
1.0×10
4
m/s
d.
9.0×10
- 3
m/s
Hint
2.
A stream of singly ionized atoms is not deflected as it passes through a 2.4×10
-3
-T magnetic field perpendicular to a 4.7×10
2
-V/m electric field. The atoms then move into a magnetic field of 0.31 T and follow a circular path of radius 0.175 m. What is the mass of each of these atoms?
a.
8.7×10
-21
kg
b.
4.3×10
-26
kg
c.
2.4×10
-16
kg
d.
4.3×10
-16
kg
Hint
3.
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 bends or deforms when a voltage is applied across it.
c.
It amplifies sound waves.
d.
It emits infrared radiation.
Hint
4.
A receiver is a combination of ____________.
a.
an antenna, a coil and capacitor circuit, and an amplifier
b.
an antenna, a capacitor circuit, and a resonator
c.
a coil and capacitor circuit
d.
an antenna and an amplifier
Hint
