1. In a varying electromagnetic field: a. Only electric field intensity is chang
ID: 2061604 • Letter: 1
Question
1. In a varying electromagnetic field:a. Only electric field intensity is changing.
b. Only magnetic field strength is changing.
c. Both electric and magnetic field intensities are changing.
d. The electric and magnetic field lines are parallel to one other.
e. The electric and magnetic field lines are in the same plane.
2. Which of the following is a ferromagnetic material?
a. Glass.
b. Aluminum.
c. Copper.
d. Nickel.
e. Zinc oxide.
3. Magnetic field lines:
a. Point in the same direction as the south pole of a compass points.
b. Form continuous loops that pass through N and S poles.
c. Are really scalar quantities and have no associated direction.
d. Originate at north magnetic poles and end at south magnetic poles.
e. Run around the earth parallel to the equator.
4. When using the right-hand rule for a positively-charged particle moving in a magnetic field, the palm of the hand points of the direction of the:
a. Particle’s motion (velocity).
b. Magnetic field lines.
c. Particle momentum.
d. Electron spin vector.
e. Magnetic force.
5. The unpaired electrons in each atom of a ferromagnetic material group spin magnetic fields together in assemblies called:
a. Clockwise spin axes.
b. Domains.
c. Current loops.
d. Hysteresis.
e. Solenoids.
Explanation / Answer
1.c. Both electric and magnetic field intensities are changing. 2.d. Nickel. 3.b. Form continuous loops that pass through N and S poles. 4.a. Particle’s motion (velocity). 5.d. Hysteresis.
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