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Practice Electricity Questions:

Describe the steps in using
coal to make electricity that comes to your house and makes your stove oven
work. (an oven has heating coils, a fan, and a light).

What are the things that might
change the: current, voltage, power, of the oven?

If an object has a -1 Charge
it:

A) has one electron B)
has 10^{19} electrons

C) has 10^{19}
extra electrons D) has
-10^{19} electrons

Describe the difference in
how electrons travel in a wire in DC and AC current:

If electricity is like
gravity, what are the similarities?

Mass

G (gravitational
acceleration)

Field

Potential Energy

Work

What are the differences?

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If two charges are moved
twice as far apart, how does the force change?

If my light is 100 Watts, and
is attached to my house, which is 120 V, what is the typical current in the
bulb?

I have a device that uses 12
V of 300 mA (.3 Amps) current. What is the amount of energy it uses in 10
seconds? How much charge flows in 10 seconds? What is the current arriving into
the device, and how is it changed?

A flashlight bulb with a
potential difference of 4.5 V has a resistance of 8 ohms. How much current is
in the bulb filament? How much power does it use?

If a light bulb has a
resistance of 240 ohms when operating at 120 V, what is the current in the
light bulb? What is the effective power use of the bulb? If the bulb is one for
1 second, how much energy is lost? Where did it go?

If a 325 Watt heater has a
current of 6 Amps, what is the resistance of the heating element?

What does the electric
company charge you for?

A) Power B) Current D) Voltage E)
Energy

Explain why you might want to
wire your house using parallel circuits, not series.

A 12 Volt battery is used to
power a light bulb. There are three resistors in series, 18 ohms, 24 ohms, and
8 ohms in the circuit before the light bulb. Draw a diagram, and calculate the
current through the bulb, and its power use.

If you connected a toaster of
1200 Watts, a coffee pot of 750 Watts, and a microwave at 600 Watts to a house
(120 V), how much current would they all draw if on at the same time?

A 12 Volt battery is
connected to resistors (10 ohms
and 20 ohms) in parallel.

Draw a diagram

What is the voltage in each
resistor?

What is the current in each
resistor?

What is the total current?

What is the total resistance?

Describe three ways to use
magnetism and wire to make a current: