Question

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

Answer #1

I think you have missed the other information mentioned in the problem. I think the missing information should be the loop diameter changes from d1 to d2 in time t seconds.

You have given the value of B = 0.78 T

So, for the part (A) -

The expression of the induced emf is -

V = dø / dt = 0.78 . ( ? . (d1/2)^2 – ? .(d2/2)^2 ) / t

put the values of d1, d2 and t, you will get the result.

For the part (B) -

Coil resistance R = 4.3 Ohm

So, avearge induced current I = V / R = (put the value of V calculated in part A) / 4.3

A circular loop in the plane of the paper lies in a 0.65 T
magnetic field pointing into the paper. If the loop's diameter
changes from 19.4 cm to 7.2 cm in 0.15 s , what is the direction of
the induced current? What is the magnitude of the average induced
emf? If the coil resistance is 3.3 ? , what is the average induced
current?

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 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 0.76 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 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?

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 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...

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...

6: A single-turn circular loop of wire rests flat on this page.
A magnetic field is directed perpendicular to this page pointing
outwards (towards you). When the magnetic field strength increases
from 3.2 T to 6.5 T in 0.026 seconds, a 1 V emf is induced in the
coil.
a) Calculate the radius of the loop.
b) State the direction of the induced current and briefly
explain how you arrived at your answer.

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...

ADVERTISEMENT

Get Answers For Free

Most questions answered within 1 hours.

ADVERTISEMENT

asked 3 minutes ago

asked 25 minutes ago

asked 38 minutes ago

asked 53 minutes ago

asked 55 minutes ago

asked 56 minutes ago

asked 56 minutes ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago