# Inducing Current Using Magnetic Fields

Ηλεκτρονική - Συσκευές

18 Οκτ 2013 (πριν από 4 χρόνια και 6 μήνες)

143 εμφανίσεις

6.09
-
01b

I
nducing Current Using Magnetic F
ields

(Lenz’s Law at work…)

Stepping back from the Right Hand Rules

True:

current is moving _____________

Moving electrons cause _____________ fields

Magnetic fields caused by current can interact with _________________
_________

Can we turn cause and effect on its head?

Outside magnetic fields can

The
_____________

Effect

The act of using a

The ideas behind

__________________________

The direction of the induced current in a loop
will set up

According to right hand rule #2 for
_____________, the magnetic field of the
solenoid will have a _____________ that
follows the
__________________________curl.

Inducing Current Scenario

The
________________________
that a
_____________
is forced throu
gh a magnetic field is up.

But, because the
__________________________
field around a wired
_____________

the outside
_____________

This means that the wire’s motion will experience a force
_____________

its
_____________
.

5

N

S

A)

B)

Personal
Notes:

6.09
-
01b

Right Hand Rule #3

compared to

_____________

Law!

Right Hand Rule # 4

Some Questions (diagram “a” just labels the 3 directions of motion). What will hap
pen
for each of the motions described in b,c, and d?

Personal
Notes
:

6.09
-
01b

N=2

N=4

N=6

What direction does the opposing right hand rule tell us about the direction of the
induced current?

_____________

and Opposite
_____________

(Lenz’s Law for induction)

Inducing
_____________

Current

The back and forth motion of a
_____________

in the vicinity of or
_____________

a
_____________

will induce a
__________________________
current flow.

This is known as
__________________________

(
AC
)

More Loops →
______
_________________________________
→ More Power

The induced _____________ is _____________the product of the
__________________________and the time __________________________through the
loops:

V
α

N
×
Area×(Change in B/Change in time)

A = Area of a single loop

If t
here’s lots of loops,
and it wiggles fast…
t桡琠摯ty潵oge琿

me牳潮r氠

6.09
-
01b

Using Induced Current to Perform Tasks

Not only can a
_____________
create current, but that current
can be used to make
__________________________
.

Follow the current in the diagram at the right and
determine the North e
nd of the Secondary coil When the
magnet is pushed into the 1
st

coil.

Transformers

(
_____________

from current

_____________

from fields)

The result of coils producing fields and fields inducing
current is that
_____________

can
_____________

be
transfe
rred to a
__________________________
.

This is called a
_____________

Electrical Power
Transmission

The _____________ of
electric power makes use
of transformers at various
stages between the
_____________ and our
_____________.

P = __________
___

----------------------------------------------------------------------------------------------------------

Transformer Equation:

_____________

Power In = Power Out:

_____________

Using Power
Conservation…

P
p
=P
s

V
p
I
p
=V
s
I
s

V
p

=

V
s

P is for Primary

S is for Secondary

Personal
Notes:

6.09
-
01b