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.

simulation: http://higheredbcs.wiley.com/legacy/college/cutnell/0470223553/concept_sims/sim47/sim47.html

Which of the following statements about this situation are true? Select all that apply.

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. OTo 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

To produce a positive current in the given loop, it is neccessary that the current in the wire increases, i.e the magnetic flux through the loop should be increasing in nature.
It does depend on how fast the flux changes, the faster the change, more the current in the loop.
Thus based on this the answers are:

option 3: "one way to produce a positive current in the loop is for the magnetic flux through the the loop to be directed out of the page and be increasing in magnitude."

option 5:  "one way to produce a positive current in the loop is for the magnetic flux through the the loop to be directed into the page and be increasing in magnitude."

option 8: "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."

Related Questions

Navigate

• Browse (All)
• Browse I
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.