Part A In (Figure 1) , specify the direction of the magnetic field at the locati
ID: 1496040 • Letter: P
Question
Part A In (Figure 1) , specify the direction of the magnetic field at the location labeled P due to each of the four sides 1-4 of the current loop.
a) At point P the magnetic field due to segments 1 and 3 is small and directed into the page. Magnetic field due to segment 2 points out of the page, and that due to segment 4 points into the page.
b) At point P the magnetic field due to segment 1 points into the page, and that due to segment 3 points out of the page. Segments 2 and 4 produce small field directed into the page.
c) At point P the magnetic field due to segments 1 and 3 is small and directed into the page. Magnetic field due to segment 2 points into the page, and that due to segment 4 points out of the page.
d) At point P the magnetic field due to segment 1 points out of the page, as that due to segment 3. Segments 2 and 4 produce small field directed into the page.
Part B Which side produces the strongest magnetic field at P?
a) side 1
b) side 2
c) side 3
d) side 4
Part C What additional information is needed to determine the direction of the magnetic field at P due to the loop?
a) We need to know the magnitude of the current.
b) We don't need any additional information to determine the direction of the magnetic field.
c) We need to know the length of the loop.
d) We need to know how the strength of the field depends on the angle and distance from the wire.
Figure 1 below
Explanation / Answer
A)
b) At point P the magnetic field due to segment 1 points into the page, and that due to segment 3 points out of the page. Segments 2 and 4 produce small field directed into the page.
B)
c) side 3
C)
b) We don't need any additional information to determine the direction of the magnetic field.
Use right hand rule:
take your in the direction direction of current then curl of your fingers indicates magnetic field lines.