Question

A 159 ‑turn circular coil of radius 3.49 cm and negligible resistance is immersed in a uniform magnetic field that is perpendicular to the plane of the coil. The coil is connected to a 10.9 Ω resistor to create a closed circuit. During a time interval of 0.141 s, the magnetic field strength decreases uniformly from 0.539 T to zero. Find the energy ? in millijoules that is dissipated in the resistor during this time interval.

Answer #1

Answer energy dissipated in resistor =70milli joules

A 173 ‑turn circular coil of radius 2.79 cm and negligible
resistance is immersed in a uniform magnetic field that is
perpendicular to the plane of the coil. The coil is connected to a
11.9 Ω resistor to create a closed circuit. During a time interval
of 0.161 s, the magnetic field strength decreases uniformly from
0.673 T to zero. Find the energy, in millijoules, that is
dissipated in the resistor during this time interval.
energy:____________ mJ

A 149-turn circular coil of radius 2.67 cm is immersed in a
uniform magnetic field that is perpendicular to the plane of the
coil. During 0.153 s the magnetic field strength increases from
51.1 mT to 99.3 mT. Find the magnitude of the average EMF, in
millivolts, that is induced in the coil during this time
interval.

A 133 turn circular coil of radius 2.77 cm is immersed in a
uniform magnetic field that is perpendicular to the plane of the
coil. Over an interval of 0.121 s, the magnetic field strength
increases from 55.7 mT to 95.9 mT. Find the magnitude of the
average emf avgEavg induced in the coil during this time interval,
in millivolts.
avg=Eavg= ?

A 29-turn circular coil of radius 3.40 cm and resistance 1.00 Ω
is placed in a magnetic field directed perpendicular to the plane
of the coil. The magnitude of the magnetic field varies in time
according to the expression B = 0.010 0t + 0.040
0t2, where B is in teslas and
t is in seconds. Calculate the induced emf in the coil at
t = 4.60 s.

A 37-turn circular coil of
radius 4.60 cm and resistance 1.00 Ω is placed
in a magnetic field directed perpendicular to the plane of the
coil. The magnitude of the magnetic field varies in time according
to the expression B = 0.010
0t + 0.040 0t2,
where B is in teslas and t is in
seconds. Calculate the induced emf in the coil
at t = 4.20 s.

A circular coil (d = 28 cm, N = 113 turns) is placed in a region
of space where there is no magnetic field. Suddenly, a magnetic
field is turned on and the coil is totally immersed in it. The
magnetic field reaches the strength of 950 mT in 3.5 ms.
Determine the voltage induced across the coil
Determine the current through a 23 Ω resistor connected across
the coil.

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 coil of 312 winds of wire (radius = 7.0 cm,
resistance = 7.4 Ω) is placed in a uniform magnetic field that is
perpendicular to the plane of the loop. The magnitude of the field
changes with time according to ? = 90sin(7?) mT, where ? is
measured in seconds. Determine the magnitude of the current induced
in the loop at ?=?/7 s.

A circular loop, of radius 15 cm and negligible resistance, is
sitting in a perpendicular magnetic field of 0.1 T. If the magnetic
field strength changes to a value of 0.5 T in 0.5 s, calculate the
induced current in the loop if it is in series with a 20 ohm
resistor.
5.7 × 10–2 A
1.2 × 10–2 A
2.8 × 10–3 A
6.0 × 10–4 A
1.1 A

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...

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