D) Direction of the force on a wire carrying current in a magnetic field
3rd Left Hand Rule - Wire in a magnetic field
1)
Draw magnetic Flux lines (______________________)
2)
Left Thumb - Point in direction of current
3)
Place four fingers in the
direction of the magnetic field
4)
Palm shows direction of the force on the conductor
Top View - Wire in a magnetic Field - Figure 1
In
which direction will the force on this wire be directed? Up or Down?
Figure 2 Figure 3
Figure 2 - In which direction will
the force on this wire be directed? Up
or Down?
Figure 3 - In which direction will the
force on this wire be directed? Up or Down?
The force on conductor is maximum when conductor is placed
______________________to field and zero when it moves
___________________ to
field.
E)
Forces between current carrying wires
Opposite Currents Wires ______
Same Current Direction/Wires attract
When
wires are _________________, no forces exist between the wires
F)
Magnetic Force on moving charges
When
a _____________ is shot through a ____________ it experiences a force.
If
you wanted to maximize the force on the charge:
a) How would you shoot a charge
through a magnetic field?
Fast or Slow??
b) What kind of charge would
you use? Big or Small??
c) What kind of magnetic field
would you use? Big or Small??
1. F
magnetic = Bq v
B - flux density of magnetic field (strength)
q
- charge ( C)
v - velocity (m/s)
The
magnetic force is _________________ when
the charge
Moving _______________________ to field
The
_______________________ is ____when
the charge moving
_________ to field
2.
Finding the direction of the magnetic force on a free charge
moving through a magnetic field
Use
3rd Left hand Rule
·
thumb - direction of moving
_____________
·
4 fingers - direction of magnetic
Field
·
palm - direction of force on
charge
Figure 1: When this charge reaches
the magnetic field, where will it be pushed? Answer: Into or Out of the page?
·
Draw in flux lines
·
thumb - direction of moving
_______________
·
4 fingers - direction of magnetic
Field
·
palm - direction of force on
charge