Question

A two-turn circular wire loop of radius 0.737 m lies in a plane perpendicular to a uniform magnetic field of magnitude 0.591 T. If the entire wire is reshaped from a twoturn circle to a one-turn circle in 0.116 s (while remaining in the same plane), what is the magnitude of the average induced emf E in the wire during this time? Use Faraday’s law in the form E = − ∆(N Φ) ∆t . Answer in units of V.

Answer #1

A five-turn circular wire coil of radius 0.425 m lies in a plane
perpendicular to a uniform magnetic field of magnitude 0.370 T. If
the wire is reshaped from a five-turn circle to a three-turn circle
in 0.101 s (while remaining in the same plane), what is the average
induced emf in the wire during this time?

A circular loop of wire with radius of 1.0 m lies in the xy
plane. A uniform 1.0 T external magnetic field is directed along
the z axis. The wire is a conductor, and carries current of 1.0
Amperes. What is the tension (or compression) in the wire due to
the external field?

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 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. ...

A circular loop of wire with radius 3 m is flat on the xy plane
in a magnetic field which is pointed in the z-direction and has a
magnitude of 5 μT. What is the magnitude of the induced emf in the
loop if the loop shrinks to a radius of 1.5 m in 3 seconds?
Group of answer choices a) 1.06e-4 V b) 3.53e-5 V c)None of the
above d) 7.85e-6 V e) 0 V

A magnetic field is perpendicular to the plane of a single-turn
circular coil. The magnitude of the field is changing, so that an
emf of 0.23 V and a current of 2.4 A are induced in the coil. The
wire is then re-formed into a single-turn square coil, which is
used in the same magnetic field (again perpendicular to the plane
of the coil and with a magnitude changing at the same rate). What
(a) emf and (b) current are...

A circular loop of wire of area 0.25?2 lies in the x-y plane
with its center at the origin. A uniform magnetic field of 2.00 T
points in the positive z-direction. The loop begins to rotate at t
= 0s at the rate of 60 rpm.
a. What is the flux through the loop as a function of time?
b. What is the emf in the loop as a function of time?
c. If the loop has a resistance of...

9. A magnetic field is perpendicular to the
plane of a single-turn circular coil. The magnitude of the field is
changing, so that an emf of 0.77 V and a current of 2.7 A are
induced in the coil. The wire is then re-formed into a single-turn
square coil, which is used in the same magnetic field (again
perpendicular to the plane of the coil and with a magnitude
changing at the same rate). What emf is induced in the...

Using Faraday’s Law equation, answer the following
mathematical questions.
A plane circular loop of conducting wire has a radius r = 8m and
N = 4 turns. It is located in a uniform magnetic field. The
magnetic field’s direction makes a 75° angle with respect to the
normal of the loop. The magnitude of magnetic field B increases at
a constant rate from B1 = 3.2 T to B2 = 4.7 T in a time interval of
t =5s. If...

A circular loop of wire lies in the x-y plane and has a radius
of 7.50 cm. There is a uniform B field in the z direction with a
sinusoidal varying strength of B_o sin?(?t) Where B_o=1.7*?10?^(-6)
T and the frequency f is 1200 kHz. What is the angular frequency of
the B-field? What is the period of a single cycle for the B-field?
What is the maximum flux in the coil of wire? What is the minimum
flux in...

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