Electric Circuits and Currents
You should know this by now
KE and PE
Energy Transfer and Conversion
100
A student is connecting their lightbulb and battery system to a popsicle stick. The student has formed this system in a loop, but the lightbulb is not turning on. Why not?
The popsicle stick is not a good conductor for electricity.
100
Does food have energy? Why?
Yes, even though it is not moving, it has the ability to make something move or change.
100
A student eats breakfast. After, she runs while listening to music from her phone. Her phone dies. What type of energy does she have the most of when she is running?
She has KE because she is moving.
100
Is this energy transfer diagram correct?
A) It is correct because it shows that energy is transferred from the food to the crank.
B) It is correct because it shows energy is converted from kinetic to potential energy.
C) It is incorrect because it is showing energy transferring from the crank to the food.
D) It is incorrect because hand cranks do not taste good.
A) It is correct because it shows that energy is transferred from the food to the crank.
200
What do the arrows represent in this system?
Electric current
200
Cats run away from me. What kind of energy do they have and why?
Kinetic energy because they are moving.
200
You walk to school. What type of energy do you have and how do you know?
KE because you are moving.
200
Is this energy transfer diagram correct?
A) It is correct because it shows that energy is transferred from the food to the crank.
B) It is correct because it shows energy is converted from potential to kinetic energy.
C) It is incorrect because it is showing energy transferring from the crank to the food.
D) It is incorrect because hand cranks do not taste good.
C) It is incorrect because it is showing energy transferring from the crank to the food.
300
________ energy in the battery is converted to ________ energy and transferred by the ________. It then converts to ________ energy when it reaches the lightbulb.
a. potential….electrical….current….light
b. potential….electrical….circuit….light
c. potential….light….current….electrical
d. kinetic….light….current….electrical
a. potential….electrical….current….light
300
Does anything create its own energy?
No. Nothing creates energy, it is always transferred from something else that has energy.
300
You wake up in the morning and eat a bagel. What type of energy does the bagel have and how do you know?
It has PE because it is storing energy.
300
Is this energy transfer diagram correct?
A) It is correct because it shows energy transferring from the light to the battery.
B) It is correct because it shows energy transferring from the battery to the light.
C) It is incorrect because it shows energy being converted from light energy to potential energy.
D) It is incorrect because there is no hand-crank.
B) It is correct because it shows energy transferring from the battery to the light.
400
Fill in the blanks with the correct multiple choice answer.
An electric ________ is the way that electrical energy is transferred from one place to another, and an electric ________ is a closed path in which an electric ________ can exist.
a. circuit….current….circuit
b. current….circuit….current
c. current….current….circuit
d. circuit...circuit...current
b. current….circuit….current
400
What is the main difference between kinetic and potential energy?
Kinetic energy is the energy that objects have when they are moving, and potential energy is the energy that objects have when they are storing energy.
400
Which are the best examples of objects that ALL have potential energy?
A) a lightbulb shining, the sun
B) a moving car, a child skating on ice
C) a battery, a stretched rubber band, food
D) a bird flying, a soccer ball flying through the air
C) a battery, a stretched rubber band, food
A battery has chemical PE, a stretched rubber band has elastic PE, and food has chemical PE, all forms of stored energy.
400
What statement is true about the energy conversion in this energy transfer diagram?
A) Energy is converted from light energy to potential energy where it is moving.
B) Energy is converted from light energy to potential energy where it is stored.
C) Energy is converted from potential energy to light energy.
D) Energy conversion means that energy is moving from one object to another.
C) Energy is converted from potential energy to light energy.
500
Draw a quick sketch of how wires would need to be connected to make the lightbulb turn on using the following items:
The sketch should include all three items connected in a loop.
A working circuit required a closed loop system.
500
Describe energy transfer starting with the sun and ending with a human and a hand crank generator. Make sure to include some chickens too.
Energy is provided by the sun, which transfers energy to plants, which provides energy to chickens, which provide energy to humans, who use kinetic energy when turning the hand crank.
500
A student eats breakfast. After, she runs while listening to music from her phone. Her phone dies. What type of energy does her phone have?
Her phone has potential energy because it is still storing energy, and has the potential to turn back on.
500
Which statement best describes the system below?
A) The flywheel stores potential energy from the engine.
B) The electrical energy stored in gasoline is converted to potential energy in the engine.
C) The potential energy stored in gasoline is converted to electrical energy in the engine.
D) The potential energy stored in gasoline is converted to kinetic energy in the engine.
D) The potential energy stored in gasoline is converted to kinetic energy in the engine.