In this simulation the current in a long straight wire produces a magnetic field

Question

In this simulation the current in a long straight wire produces a magnetic field. Depending on what is happening to the current in that wire, there may or may not be a current induced in the conducting loop shown to the right of the wire. An ammeter measures the current in the loop. Try moving the slider, which controls the current in the wire, to see what happens to the current in the loop.
http://higheredbcs.wiley.com/legacy/college/cutnell/0470223553/concept_sims/sim47/sim47.html
b) Which of the following statements about this situation are true? Select all that apply.

To produce a positive current in the loop the magnetic flux through the loop must be directed out of the page.
To produce a positive current in the loop the magnetic flux through the loop must be directed into the page.
One way to produce a positive current in the loop is for the magnetic flux through the loop to be directed out of the page and be increasing in magnitude.
One way to produce a positive current in the loop is for the magnetic flux through the loop to be directed out of the page and be decreasing in magnitude.
One way to produce a positive current in the loop is for the magnetic flux through the loop to be directed into the page and be increasing in magnitude.
One way to produce a positive current in the loop is for the magnetic flux through the loop to be directed into the page and be decreasing in magnitude.
To produce a current in the loop the magnetic flux through the loop must be changing, but it makes no difference how fast the current in the wire changes.
To produce a current in the loop the magnetic flux through the loop must be changing. The faster the flux through the loop changes the larger the magnitude of the current in the loop.

Explanation / Answer

1F 2F 3F 4T 5T 6F 7F 8T

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