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Electricity/Magnets
Question | Answer |
---|---|
What are the three components of a circuit? | Energy source, conductor and load |
What property of an object describes how easily electricity flows through it? | Conductivity |
What type of materials are usually good conductors? | Metals |
Why is copper wire used in circuits? | Because it conducts electricity well |
In a circuit with a battery and a lightbulb, chemical energy is changed into electrical energy and then what type of energy? | Light |
What do we call materials that do not conduct electricity? | Insulators |
What are some examples of insulators? | Wood, rubber, plastic, cotton, glass |
What are two ways to make and electromagnet stronger? | Add more wire wraps and add more batteries |
What is the main difference between static electricity and current electricity? | Current electricity involves a flow of electrons; static electricity involves a single transfer of electrons |
What is an electrical current? | The flow of electrons |
What do generators do? | Change mechanical energy into electrical energy |
What do motors do? | Change electrical energy to mechanical energy |
What do like (same) charges or poles do? (example: N touching N) | Repel |
What is the name of a material that conducts electricity only in certain circumstances? | Semiconductor |