Electromagnetism MCQs
Electromagnetism MCQs
Answer these 30+ Electromagnetism MCQs and assess your grip on the subject of Electromagnetism.
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1: A wire carrying a current is bent into a loop. the magnetic field is strongest _____.
A. North pole
B. Motor
C. Its center
D. Generator
E. Transformer
2: A capacitor ________.
A. Voltage supply, timer, noise filter
B. Microphone, radio, speaker
C. Stores electrons, passes AC, blocks DC
3: A step-up transformer in an electrical circuit can step up _______.
A. Voltage
B. Energy
C. Both of these
D. Neither of these
4: The magnetism of a permanent magnet results from __________.
A. Interactions with Earth's magnetic field.
B. The magnetic moments of nuclei in the material making up the magnet.
C. Macroscopic electric current through the magnet.
D. The magnetic moments of electrons in the material making up the magnet
5: The magnetic field about a straight length of current-carrying wire is _________.
A. Circular in shape
B. Oval in shape
C. Square in shape
D. Straigh line
6: The force that acts on a current-carrying wire placed in a magnetic field is _________.
A. Parallel in direction to the magnetic field
B. Perpendicular in direction to the magnetic field
C. Both A & B
D. None of the above
7: The field inside a charged parallel-plate capacitor is __________.
A. Has no net charge.
B. Zero
C. A positive charge.
D. Uniform
8: Compared with a simple galvanometer, an electric motor is _________.
A. The coil becomes a stronger electromagnet
B. Circle the wire in closed loops.
C. Much the same with small modifications
D. Similar to that of an interior bar magnet
9: When an iron rod is placed inside a current-carrying coil of wire _________.
A. The changing magnetic field that produces it alternates
B. North or South pole - no difference really
C. The coil becomes a stronger electromagnet
D. Similar of that to an interior bar magnet
10: Earth's magnetic field does not affect ____
A. Moving charged particles It does affect these.
B. Other planets That's correct!
C. Permanent magnets It does affect these.
D. Electromagnets It does affect these
11: In this video, we see that a _____ magnetic field can create an electric current.
A. Strong
B. Changing
C. Dipole
D. Perpendicular
12: Like charges ____________________ and opposite charges ____________________.(1 point)
A. Like = repel; opposite = attract
B. Like = repel; unlike(opposite) = attract
C. Protons; electrons.
D. None of these
13: Two parallel wires carry a current in the same direction. there is ___________ between the wires.
A. A repulsive force
B. No force
C. An attractive force
14: Iron filings sprinkled near a magnet arrange themselves into a pattern that illustrates the _____.
A. Magnetic poles
B. Magnetic field
C. Magnetic domain
D. Magnetic alignment
15: The ___________ is a plane perpendicular to the optic axis through the focal point.
A. Optic axis
B. Focal point
C. Light ray
D. Paraxial ray approximation
E. Focal plane
16: In an electromagnetic wave, the electric field and magnetic fields __________.
A. Always in phase
B. Always in anti-phase
C. Always at 90 degrees phase difference
D. Always at 45 degrees phase difference
17: Radio waves have a ________ wavelength than visible light and are therefore ________ energetic.
A. Longer; less
B. Shorter; more
C. Shorter; less
D. Longer; more
18: A primary difference between a motor and a generator is _________.
A. The reversed roles of input and output
B. The same roles of input and output
C. None
19: According to your textbook, electric field lines are sometimes called __________.
A. Push lines
B. Lines of force
C. Electric lines
20: If you change the magnetic field inside a closed loop of wire, you induce in the loop _______.
A. A voltage
B. A current
C. An electric field
D. All of these
21: In order that electromagnetic induction occurs in a circuit there must be a _________.
A. Change in magnetic field intensity
B. Parallel to the conductor
C. Perpendicular to the conductor
D. Circular around the conductor
22: Large power plants in the united states use ____________________ generators
A. AC
B. DC
C. Both
D. None of these
23: The greek letter s represents __________ in this chapter.
A. Surface charge density
B. Parallel to the conductor
C. Perpendicular to the conductor
D. Circular around the conductor
24: The greeks studied charges using _____.
A. Gold
B. Copper
C. Magnetite
D. Amber
25: The magnetic domains in a magnet produce a weaker magnet when the magnet is _______.
A. Either of these answers
B. Parallel to the conductor
C. Perpendicular to the conductor
D. Circular around the conductor
26: The magnetic field around a current-carrying conductor is _____.
A. Parallel to the conductor
B. Perpendicular to the conductor
C. Circular around the conductor
D. Unpredictable in orientation
27: The magnetic field lines due to a straight, current-carrying wire are __________.
A. Straight lines parallel to the wire.
B. Circles around the wire.
C. Straight lines perpendicular to the wire.
D. Start at one end of the wire and end on the other end of the wire
28: What ultimately transfers from one location to another in electromagnetic induction is _________.
A. Energy
B. An attractive force
C. Magnetic field
D. Velocity
29: When a magnet is quickly pushed into a coil of wire connected to a circuit _________.
A. Work is needed to overcome a resistance to the push
B. Higher order to lower order.
C. Lower order to higher order.
D. Disorganization to organization
30: The force that acts on an electron traveling in a magnetic field is _________.
A. Perpendicular in direction to the magnetic field
B. Like poles repel each other while opposite poles attract
C. Perpendicular in direction to the magnetic field
D. Much the same with small modifications
31: The magnetic field about earth takes a shape _________.
A. Aligned iron atoms
B. Circular in shape
C. Similar to that of an interior bar magnet
D. Add or subtract by vector rules
32: The source of a magnetic field is a moving _________.
A. Atoms
B. Electron
C. Protons
D. Neutrons
33: The fundamental rule for the attraction and repulsion of magnets is that _________.
A. Like poles repel each other while opposite poles also repel
B. Like poles repel each other while opposite poles attract
C. Like poles attract each other while opposite poles also attract
D. Like poles attract each other while opposite poles repel
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