Download Friday, Feb. 17th Drill

The current through a toaster
that is connected to a 120-V
source is 8.0 A. What power is
dissipated by the toaster?
Broadneck High School
Outcome:
The student will be able to
calculate resistance and
current through active
engagement in a lab activity.
Broadneck High School
What will we actually be doing?
Drill
 Outcome
 Homework
 Lab

Broadneck High School
Review of 22.1
Conventional current moves in the
direction in which a positive charge
would move.
 Generators convert mechanical energy
to electric energy.
 A circuit converts electric energy to
heat, light, or some other useful
output.
 As charge moves through a circuit,
resistors cause a drop in potential
energy (V).

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Formulas
Broadneck High School
Don’t forget that…
any resistance that does not change
with temperature, voltage, or the
direction of charge flow obeys Ohm’s
law.
 circuit current can be controlled by
changing voltage, resistance, or both.

Broadneck High School
Exit ticket
 Use
P = IV and R = V/I to find
an equation for power that
doesn’t depend on voltage.
Broadneck High School