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Which describes the procedure for finding the magnetic field on thecentral axis of a current loop due to the elements on theloop?



We sum the field components that are parallel to the centralaxis.


We sum the magnitudes of the magnetic fields.


We sum the field components that are perpendicular to the centralaxis.

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Related textbook solutions

Physics: Principles with Applications
7th Edition, 2013
Giancoli
ISBN: 9780321625922

Related questions

A square current loop 5.5 cm on each side carries a 470 mA current.The loop is in a 0.70 T uniform magnetic field. The axis of theloop, perpendicular to the plane of the loop, is 30 degrees awayfrom the field direction.
What is the magnitude of the torque on the current loop? 2 sig fig.

A coil of wire is connected to a power supply, and a currentruns in the coil. A single loop of wire is located near the coil,with its axis on the same line as the axis of the coil. The radiusof the loop is 2 cm.




At time t1 the magnetic field at the center of the loop, due to thecoil, is 0.4 T, in the direction shown in the diagram; the currentin the coil is constant.

(a) What is the absolute value of the magnetic flux through theloop at time t1?
Φ mag = T m2
(b) What approximations or assumptions did you make in calculatingyour answer to part (a)?

Check all that apply.

1.The magnitude of the magnetic field due to the coil is uniformover the area of the loop.
2.The magnetic field outside the loop is zero.
3. The magnetic field due to the coil is uniform in direction overthe area of the loop.


(c) What is the direction of the "curly" electric field inside thewire of the loop at time t1? (Remember that at this time thecurrent in the coil is constant.)
E = 0

At a later time t2, the current in the coil begins todecrease.

(d) Now what is the direction of the "curly" electric field in theloop?
counter-clockwise
At time t2 the rate of change of the magnetic field at the centerof the loop, due to the coil, is -0.36 T/s.
(e) At this time, what is the absolute value of the rate of changeof the magnetic flux through the loop?
|dΦmag/dt| = T m2/s
(f) At this time, what is the absolute value of the emf in theloop?
|emf| = V
(g) What is the magnitude of the electric field at location P,which is inside the wire?
|E| = V/m
(h) Now the wire loop is removed. Everything else remains as it wasat time t2; the magnetic field is still changing at the same rate.What is the magnitude of the electric field at location P?
|E| = V/m

A square current loop lies flat in the x-y plane with its sidesparallel to the x and y axes. The side of the square is a. Thecurrent flowing in the loop is I, in the CCW direction as viewedfrom above. A uniform magnetic field ~B = B0(^i/sqrt(2) + ^k/sqrt(2)) is applied to the loop.

(a) Find the magnetic force (magnitude and direction) on each sideof the
loop. Check that the sum of the four forces equals zero.
(b) Find the torque (magnitude and direction) on the current loop.

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