Question

A fixed 13.6-cm diameter wire coil is perpendicular to a
magnetic field 0.4 T

pointing up. In 0.30s, the field is changed to 0.24T pointing
down.

What is the average induced emf in the coil?

Answer #1

Given data

diameter, d = 13.6 cm = 13.6*10^-2 m = 0.136 m

=> radius = d/2 = 0.136/2 = 0.068 m

time t = 0.3 s

induced emf = rate of change of flux

E = d(BA)/dt

= A * dB/dt

= { [ pi * (0.068)^2 ] *[0.4 - (-0.24) ] } / 0.3

**= 0.031 Volt ......Ans**

A fixed 12.1-cm-diameter wire coil is perpendicular to a
magnetic field 0.71 T pointing up. In 0.14 s , the field is changed
to 0.15 T pointing down.
What is the average induced emf in the coil?

A fixed 11.8-cm-diameter wire coil is perpendicular to a
magnetic field 0.44 T pointing up. In 0.22 s, the field is changed
to 0.25 T pointing down.
What is the average induced emf in the coil?
Express your answer to two significant figures and include the
appropriate units.

A fixed 15.6-cm-diameter wire coil is perpendicular to a
magnetic field 0.52 T pointing up. In 0.24 s, the field is changed
to 0.31 T pointing down. What is the average induced emf in the
coil? Express your answer to two significant figures and include
the appropriate units.

A fixed 16.9-cm diameter wire coil is perpendicular to a
magnetic field 0.44 TT pointing up. In 0.28 s, the field is changed
to 0.30 TT pointing down.
What is the average induced emf in the coil?

A fixed 11.8-cm
c
m
-diameter wire coil is perpendicular to a magnetic field 0.52
T
T
pointing up. In 0.25 s
s
, the field is changed to 0.24 T
T
pointing down.
What is the average induced emf in the coil?
Express your answer to two significant figures and include the
appropriate units.

A 13.4 cm -diameter wire coil is initially oriented so that its
plane is perpendicular to a magnetic field of 0.30 T pointing up.
During the course of 0.20 s , the field is changed to one of 0.24 T
pointing down.
What is the magnitude of the average induced emf in the
coil?

shows a 100-turn coil of wire of radius 15 cm in a 0.25 T
magnetic field. The coil is rotated 90? in 0.30 s, ending up
parallel to the field. What is the average emf induced in the coil
as it rotates?

A 26.8 cm-diameter loop of wire is initially oriented
perpendicular to a 1.6 T magnetic field. The loop is rotated so
that its plane is parallel to the field direction in 0.22 s .
What is the magnitude of the average induced emf in the
loop?
Express your answer using two significant figures.
Eavg=
V

An 1000-turn coil of wire that is 2.2 cm in diameter is in a
magnetic field that drops from 0.12 T to 0 T in 11 ms . The axis of
the coil is parallel to the field.
What is the emf of the coil?
E = ______V
Please show work

Question 1: A 13.7 cm diameter loop of wire is initially
oriented perpendicular to a 1.9 T magnetic field. The loop is
rotated so that its plane is parallel to the field direction in
0.33 s .
Part A: What is the average induced emf in the loop?
Question 2: A 7.4 cm diameter circular loop of wire is in a 0.71
T magnetic field. The loop is removed from the field in 0.28 s .
Assume that the loop...

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