Transcript Electricity - Gouverneur Central School District

Electron – Nucleus
Applet
Pretzelscope
Review
In the video the glass rod becomes
positively charge. When the rod
approaches the pretzelscope the
leaves separate, the person grounds
the scope (leaves fall) then removes
the rod, the leaves separate and
remain separated. Why does this
occur? Draw a diagram of the end
result.
Remember only electrons are mobile
Review
A frictionless cart with mass of
80kg rolls down a track from a
height of 20 meters from the
ground, what is the velocity of
the cart when it reaches ground
level?
Electroscope
Draw a diagram
representing the
charge in the
electroscope (assume
a negatively charged
comb). What is the
method used to charge
the electroscope?
What other method
could be used?
Review
Calculate the work done to move an
electron from one point to another in
household circuit (120V).
An electric field is measured using a positive test charge of
3x10^-6 C. The test charge experiences a force of .12N at an
angle of 15 degrees north of east. What are the magnitude
and direction of the electric field strength at the location of
the test charge.
Review
Draw the electric field around the two
charges.
Find the resistance of an
aluminum conductor (cylindrical)
2 meters long with a diameter of
.25 meters.
An electron is deflected upward
between the plates. Draw the
electric field.
Review
To increase the brightness of a desk
lamp, a student replaces a 60-watt
light bulb with a 100-watt bulb.
Calculate and compare the current
and resistance for the two bulbs.
Remember the voltage of a
household circuit.
Review – Series Circuits
Draw and label a circuit
diagram for the given
image. If the battery is
3V and the bulbs each
have an internal
resistance of 11ohms,
calculate the current
within the circuit.
Review – Series and Parallel
Calculate the
equivalent resistance
of the circuit, the
voltage drop for R1
and R2, and total
current.
Domains
Review – Projectile Motion
A cannonball is fired from
ground level at an angle of 60
degrees and with a speed of 72
m/s.
A. What is the time of flight?
Neglect friction
Review
Draw the magnetic field around the conductor.
The x means
into the page.