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Current Electricity - BrainPop
By NICHOLAS GLAESER
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Last updated almost 2 years ago
10 questions
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What do fuel cells, batteries, and solar cells have in common?
They all produce static electricity
They are all sources of direct current
They can all be used to power automobiles
They are all sources of alternating current
What can you infer about this source of electricity?
It is a source of direct current
It is a source of alternating current
It is a source of electromagnetic radiation
It is a source of static electricity
How does alternating current differ from direct current?
Direct current always flows in the same direction; the direction of an alternating current switches back and forth
Alternating current produces more voltage than direct current
Direct current produces more voltage than alternating current
Alternating current always flows in the same direction; the direction of a direct current switches back and forth
How does electricity travel from power plants to your house?
It travels through the air as electromagnetic waves
Through a series of generators
Through a series of many transformers
Through transmission wires
What is the function of every generator on Earth?
Changing mechanical energy into electrical energy
Changing solar energy into electrical energy
Changing wind energy into electrical energy
Changing heat energy into electrical energy
How does a generator create current?
By using an electromagnet
By using energy from the sun
By using an internal combustion engine
By using a fan
Place the following events in sequence:
A) Voltage is increased by a transformer
B) Voltage is decreased by a transformer
C) Electrical current enters your home
B, A, C
A, B, C
A, C, B
B, C, A
Which of the following are sources of mechanical energy?
Cars and trucks
Transmission lines and transformers
Wind and fossil fuels
Radios and televisions
What is the main function of a turbine?
Reducing the voltage of an electrical current
Increasing the voltage of an electrical current
Spinning
Producing a magnetic field
What is one possible reason why it's a good idea to conserve electricity?
Using too much electricity can cause power plants to break down.
Using too much electricity can start dangerous electrical fires.
Power companies only give each home a limited amount of electricity every day.
It is often produced by burning fossil fuels, which are a polluting, non-renewable resource.