Question

A circular loop in the plane of the paper lies in a 0.38 T magnetic field pointing into the paper.

Part A: If the loop's diameter changes from 19.4 cm to 5.8 cm in 0.49 s , what is the direction of the induced current?

Part B: What is the magnitude of the average induced emf?

Answer #1

The answers are

A circular loop in the plane of the paper lies in a 0.76 T
magnetic field pointing into the paper. If the loop's diameter
changes from 20.2 cm to 9.6 cm in
0.56 s. What is the direction of the induced current? What is
the magnitude of the average induced emf?

A circular loop in the plane of a paper lies in a 0.75 TT
magnetic field pointing into the paper. The loop's diameter changes
from 20.5 cmcm to 6.4 cmcm in 0.46 ss .
What is the magnitude of the average induced emf?
What is the average induced current if the coil resistance is
4.3 Ω?

A circular loop in the plane of the paper lies in a 0.75 T
magnetic field pointing into the paper. The loop’s diameter is
changed from 20.0 cm to 6.0 cm in 0.50 s.
Determine the direction of the induced current and justify your
answer.
Determine the magnitude of the average induced emf.
If the coil resistance is 2.5 Ω, what is the average induced
current?

A circular loop in the plane of the paper lies in a 0.78 T
magnetic field pointing into the paper.
A) What is the magnitude of the average induced emf? Answer in
V.
B) If the coil resistance is 4.3 ohm , what is the average
induced current? Answer in A

A time-varying magnetic field is perpendicular to the plane of a
circular loop of diameter 10 cm made with wire of diameter 3.4 mm
and resistivity 2.07 × 10-8?·m.
The magnetic field increases as a function of time, with magnitude
B = (0.79 t) T/s
a) What is the magnitude of the emf induced in the loop?
b) What is the value of the current through the loop?
c) At what rate does energy appear as thermal energy in the...

A circular conducting loop of radius 31.0 cm is located in a
region of homogeneous magnetic field of magnitude 0.300 T pointing
perpendicular to the plane of the loop. The loop is connected in
series with a resistor of 109 Ω. The magnetic field is now
increased at a constant rate by a factor of 2.40 in 15.0s.
1) Calculate the magnitude of the induced emf in the loop while
the magnetic field is increasing.
2) Calculate the magnitude of...

A circular conducting loop of radius 31.0 cm is located in a
region of homogeneous magnetic field of magnitude 0.100 T pointing
perpendicular to the plane of the loop. The loop is connected in
series with a resistor of 211 Ω. The magnetic field is now
increased at a constant rate by a factor of 2.80 in 17.0s.
1.) Calculate the magnitude of the induced emf in the loop while
the magnetic field is increasing.
2.) Calculate the magnitude of...

A 26.8 cm-diameter loop of wire is initially oriented
perpendicular to a 1.6 T magnetic field. The loop is rotated so
that its plane is parallel to the field direction in 0.22 s .
What is the magnitude of the average induced emf in the
loop?
Express your answer using two significant figures.
Eavg=
V

A circular loop of wire with area 0.020 m2m2 lies in the
x-y plane. Initially there's a magnetic field of 3.6 TT in
the -z-direction. The field remains constant for 11 ss ,
then decreases gradually to zero in 11 ss , and then remains zero
for 11 ss .
Part A: Find the magnitude of the induced emf in the loop for
the first 11 ss interval.
Express your answer to two significant figures and include the
appropriate units....

A circular loop of wire of radius R lies in the
xy-plane, where a time-varying, radially symmetric
magnetic field of magnitude B = k r
t3 (in SI units) points in the
positive z-direction. Here, t is time, r
is the distance from the centre of the loop, and k is a
positive constant.
(i) What must be the SI units of k ?
(ii) Calculate the magnetic flux Φm through the loop
as a function of time t. ...

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