Question

**4**. A length of 20-gauge copper wire (of
diameter 0.8118 mm) is formed into a circular loop with a radius of
30.0 cm. A magnetic field perpendicular to the plane of the loop
increases from zero to 13.0 mT in 0.28 s. Find the average
electrical power dissipated in the process.

Answer in W

Answer #1

A 19.0 cm -diameter coil consists of 21 turns of circular copper
wire 3.0 mm in diameter. A uniform magnetic field, perpendicular to
the plane of the coil, changes at a rate of 8.38×10−3
T/s .
a) Determine the current in the loop.
b) Determine the rate at which thermal energy is produced.

A 20.8 cm -diameter coil consists of 22 turns of circular copper
wire 2.8 mm in diameter. A uniform magnetic field, perpendicular to
the plane of the coil, changes at a rate of 8.50×10^?3 T/s .
a) Determine the current in the loop
b) Determine the rate at which thermal energy is produced.

A 23.6 cm -diameter coil consists of 21 turns of circular copper
wire 3.0 mm in diameter. A uniform magnetic field, perpendicular to
the plane of the coil, changes at a rate of 8.60×10?3 T/s.
Part A: Determine the current in the loop.
Part B: Determine the rate at which thermal energy is
produced.

A 15.4 cm -diameter coil consists of 21 turns of circular copper
wire 2.6 mm in diameter. A uniform magnetic field, perpendicular to
the plane of the coil, changes at a rate of 7.02×10−3
T/s .
Determine the current in the loop.
Express your answer using two significant figures.
I =
A
Determine the rate at which thermal energy is produced.
Express your answer using two significant figures.
P =
W

The magnetic field perpendicular to a single 15.7-cm-diameter
circular loop of copper wire decreases uniformly from 0.530 T to
zero. If the wire is 2.25 mm in diameter, how much charge moves
past a point in the coil during this operation? The resistivity of
copper is 1.68×10−8Ω⋅m.

The magnetic field perpendicular to a single 14.2-cm-diameter
circular loop of copper wire decreases uniformly from 0.670 T to
zero. If the wire is 2.75 mm in diameter, how much charge moves
past a point in the coil during this operation? The resistivity of
copper is 1.68×10−8Ω⋅m. Express your answer to three significant
figures and include the appropriate units.

The magnetic field perpendicular to a single 15.7-cm-diameter
circular loop of copper wire decreases uniformly from 0.550 T to
zero.
If the wire is 2.75 mm in diameter, how much charge moves past a
point in the coil during this operation? The resistivity of copper
is 1.68×10−8Ω⋅m. Express your answer to three significant figures
and include the appropriate units.

A uniform magnetic field is perpendicular to the plane of a
circular loop of diameter 7.6 cm formed from wire of diameter 3.2
mm and resistivity of 1.83 × 10-8Ω·m. At what rate must
the magnitude of the magnetic field change to induce a 8.8 A
current in the loop?

A 26.0 cm diameter coil consists of 24 turns of cylindrical
copper wire 2.40 mm in diameter. A uniform magnetic field,
perpendicular to the plane of the coil, changes at a rate of
6.50e-3 T/s. Determine the current in the loop in milli-amps (the
resistivity for copper is 1.72e-8Ω.m).
answer in mA

A 29 cm diameter coil consists of 22 turns of cylindrical copper
wire 2.6 mm in diameter. A uniform magnetic field, perpendicular to
the plane of the coil, changes at a rate of 7.00

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