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- 1. Multiple Choice___ Law says that the Induced current is proportional to the change of magnetic fluxLenz'Faraday'sAmpere's
- 2. Multiple Choice___ Law says that a current produced by an induced emf moves in a direction so that its magnetic field opposes the original change in fluxLenz'Faraday'sAmpere's
- 3. Multiple Choice
If you wrap more coils around an electromagnet, it will become...brighterstrongerweakerinvisible - 4. Multiple Choice
Find the direction of the magnetic force assuming the charge is positive.
Down
Into the screen
Out of the screen
Up
- 5. Multiple Choice
Find the direction of the magnetic force assuming the charge is positive.
Into the screen
Out of the screen
Right
Left
- 6. Multiple Choice
Faraday's Law states that the induced voltage or "emf" is proportional to...
the resistance
the cross sectional area of the coil
the rate of change in the flux of the coil
- 7. Multiple Choice
Faraday's law calculates voltage.
True
False
- 8. Multiple Choice
Can you produce current in a wire with a magnet that is sitting still?
Yes; having a magnet near a wire is enough to excite the electrons
No; the magnetic field has to be changing to excite the electrons
No; magnets cannot create electricity
- 9. Multiple ChoiceAn electrical current creates a_______.magnetic fieldsolenoidinsulatormagnet
- 10. Multiple Choice
Find the direction of the magnetic force assuming the charge is negative.
Into the screen
Out of the screen
Right
Left
- 11. Multiple Choice
Find the direction of the magnetic force assuming the charge is negative.
Down
Into the screen
Out of the screen
Up
- 12. Multiple Choice
A coil of wire of 10 turns has across sectional area of 0.08 m2. A magnetic field of 0.4T passes through the coil perpendicular to the plane of the coil. What is the total magnetic flux through the coil?
0 Wb
0.16 wb
0.27 Wb
0.32 Wb
- 13. Multiple Choice
A coil of wire of 20 turns has across sectional area of 0.1 m2. A magnetic field of 0.5T passes through the coil parallel to the plane of the coil. What is the total magnetic flux through the coil?
0 Wb
0.5 Wb
0.86 Wb
1 Wb
- 14. Multiple Choice
The SI unit of magnetic field is
weber
gauss
tesla
farad
- 15. Multiple ChoiceWhat does the following represent?
⊙⊙⊙⊙⊙⊙⊙⊙⊙⊙⊙⊙⊙⊙⊙
⊙⊙⊙⊙⊙⊙⊙⊙⊙⊙⊙⊙⊙⊙⊙
⊙⊙⊙⊙⊙⊙⊙⊙⊙⊙⊙⊙⊙⊙⊙A crowd with binocularsA bunch of coaxial cablesUniform magnetic field directed into the screen away from youUniform magnetic field directed out of your screen at you - 16. Multiple Choice
What does the following represent?
⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗
⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗
⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗
Multiplied by a billion
A piece of modern art
Uniform magnetic field directed into the screen away from you
Uniform magnetic field directed out of your screen at you
- 17. Multiple Choice
A wire carries a current, creating a magnetic field around itself as shown. The current in the wire is:
Directed to the right
Directed to the left
Equal to the magnetic field
In the same direction as the magnetic field
- 18. Multiple Choice
Which poles does a magnet have?
North, South, East, West
South and East
North and South
North by Southeast
- 19. Multiple Choice
A basic law of magnetism states:
A north pole will be repelled by a south pole
A permanent magnet will not react with an electromagnet
Like magnetic poles attract, unlike poles repel
Like magnetic poles repel, unlike poles attract
- 20. Multiple ChoiceWhat is the direction of the induced magnetic field?LeftRightUpDown
- Answer choicesTagsAnswer choicesTags