
Post- test April 16
Authored by Ruth Ello
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University

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12 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
It is a fundamental law in electromagnetism that describes the relationship between a magnetic field and the current that creates it.
Magnetic fields
Biot Savart Law
Ampere's Law
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Ampere's law states that B = μ0I / 2πr. The name of the constant, μ0, is
Ampere's number
Ampere's constant
the permeability of closed space
the permeability of free space
3.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
___ Law defines the magnetic field generated by a long straight wire
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Ampere's law states that B = μ0I / 2πr. This is useful in practice because
people want to see wires move
it allows people to calculate a magnetic field as long as they know how much current there is and the radius of a conductor
it allows people to calculate a magnetic field as long as they know how much current there is and the length of a wire
it allows people to calculate the amount of current passing through as long as they know the magnetic field strength and the radius of a conductor
5.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
If you wrap more coils around an electromagnet, its magnetic strength will become...
brighter
stronger
weaker
invisible
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the principle of an electromagnet?
Magnetic field is produced by an electric current
Magnetic field is produced by magnetism
Magnetic field is produced by relactance
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Ampere's Law is
Equation 1
Equation 2
Equation 3
Equation 4
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