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Phys 232 Exam

Authored by Charles Martinez

Physics

12th Grade

NGSS covered

Phys 232 Exam
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15 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The voltage induced across an inductor as its magnetic field collapses is called ____.

Counter emf
Transition voltage
Reverse voltage
Counter voltage

Tags

NGSS.HS-PS2-5

NGSS.HS-PS3-5

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

In order to induce a voltage across a coil ____.

The coil must be in motion
Current must be increasing
There must be relative motion between the coil and the magnetic field
The coil must be cut by at least 10^8 lines of force per second

Tags

NGSS.HS-PS3-5

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Lenz's law states that the induced voltage across an inductor ____. 

Always opposes the current through the inductor
Always opposes any change in current
Changes polarity as current changes direction
Always opposes the applied votage

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

An inductor ____.

All of the above

Provides a specific value of inductance

Opposes any change in current

Stores energy in a magnetic field

Tags

NGSS.HS-PS2-5

NGSS.HS-PS3-5

NGSS.HS-PS3-2

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The production of a voltage across an inductor as a result of its own  expanding or contracting magnetic field is called ____.

Flux density
Self-inductance
Counter emf
Faraday's second law

Tags

NGSS.HS-PS2-5

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The most practical way to change the magnetic field of an inductor is to increase or decrease the current through the coil.

false
true

Tags

NGSS.HS-PS2-5

NGSS.HS-PS3-5

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

the voltage induced across an inductor is inversely proportional to the rate of change of magnetic flux.

true
false

Tags

NGSS.HS-PS2-5

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