Question

The voltage rating of a coil must never be?

Answer #1

The primary coil of a transformer has N1 = 340 turns, and the
secondary coil has N2 = 2 190 turns. If the input voltage across
the primary coil is Δv(t) = 170 cos ωt, where Δv is in volts and t
is in seconds, what rms voltage is developed across the secondary
coil?

3. The secondary voltage is 220 Volt and primary voltage is 110
volt, then the ratio of the secondary coil to primary coil is

Nichrome wire of cross-sectional radius 0.796 mm is to be used
in winding a heating coil. If the coil must carry a current of 9.75
A when a voltage of 1.50 ✕ 102 V is applied across its ends, find
the following. (a) the required resistance of the coil Ω (b) the
length of wire you must use to wind the coil m

A step-up transformer has a primary coil with 100 loops and a
secondary coil with 800 loops. If the primary coil is supplied with
a household current of 120V and 12 A,
(a) what voltage is produced in the secondary circuit?
? V
(b) what current flows in the secondary circuit?
? A

An ideal step-down transformer has a primary coil of 370 turns
and a secondary coil of 25 turns. Its primary coil is plugged into
an outlet with 115 V(AC), from which it draws an rms current of
0.69 A.
What is the voltage in the secondary coil?
Calculate the rms current in the secondary coil.
Assuming that the transformer secondary is driving a resistive
load, calculate the average power dissipated in the resistor.

a) An ideal step-down transformer has a primary coil of 400
turns and a secondary coil of 14 turns. Its primary coil is plugged
into an outlet with 240 V(AC), from which it draws an rms current
of 0.35 A. What is the voltage in the secondary coil?
b) Calculate the rms current in the secondary coil.
c) Assuming that the transformer secondary is driving a
resistive load, calculate the average power dissipated in the
resistor.

A coil of 12 turns is in the shape of an ellipse having a major
axis of 20.2 cm and a minor axis of 9.82 cm. The coil rotates at 94
rpm in a region in which the Earth's magnetic field is 56.2 μT.
What is the maximum voltage induced in the coil if the axis of
rotation of the coil is along its major axis and this axis of
rotation is aligned perpendicular to the Earth's magnetic field?
What...

A transformer has 310 turns in the primary coil and 180 in the
secondary coil.
a.By what factor does it change the voltage? Assume 100%
efficiency.
b.By what factor does it change the current?
Express your answer using three significant figures.

A 460-loop circular armature coil with a diameter of 9.0 cm
rotates at 120 rev/s in a uniform magnetic field of strength 0.60 T
.
Part A
What is the rms voltage output of the generator?
Express your answer to two significant figures and include the
appropriate units.
Part B
What would you do to the rotation frequency in order to double
the rms voltage output?
What would you do to the rotation frequency in order to double the
rms...

A closely wound, circular coil with radius 2.80 cm has 740
turns.
Part A
What must the current in the coil be if the magnetic field at
the center of the coil is 0.0770 T ?
Part B
At what distance x from the center of the coil, on the axis of
the coil, is the magnetic field half its value at the center?

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