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Science Chapter15
Electricity
| Question | Answer |
|---|---|
| What type of circuit has more than one resistor on a wire? | A series circuit |
| Which of the following is a example of a conductor: A Glass B Rubber C Plastic D Salty Water | Salty Water |
| How is a parallel circuit different from a series circuit? | A parallel circuit has more than one pathway. |
| How are conductors and insulators different? Give a an example of a conductor and an insulator. | A conductor is a material through which an electric charge can move easily. Those whould be copper,gold,silver, and aluminum. An insulator would be a strong resistor that can stop most electrical currents. That would be like rubber,glass, and dry cotton. |
| Which unit is used to describe the amount of electrical energy provided by an energy source? | Volt |
| How can you make an electromagnet stronger? | Increase the number of coils. |
| Compare and contrast an electromagnet and a regular magnet. | An electromagnet is a magnet that carries an electrical current.For a regular magnet the strength cannot be quickly changed but an electromagnet can. They were both similar because they both have North and South poles. |
| What makes a material a superconductor? | It has almost no resistance to electrical current. |
| What is a magnet that can carry an electric current? | An electromagnet |
| A circuit with several branches or pathways is a .... | Parallel circuit |
| Each branch in a parallel circuit may hold several resistors. | T |
| All branches in a parallel in a parallel circuit have to be on at the same time. | F |
| Switches can control each branch in a parallel circuit separately. | T |
| Electrical currents do not always produce a magnetic force. | F |
| Electromagnets cannot be made stronger. | F |
| Electromagnets can be switched off and on. | T |
| Steel contains iron. How might an electromagnet in sorting steel from other metals at a scrap metal yard? | Steel has iron and iron is magnetic. |
| Circuit | |
| Battery | |
| Circuit Diagram | |
| Volt | |
| Amperes | |
| Heat | |
| Closing | |
| Resistor | |
| Current | |
| Conductor | |
| Resistor | |
| Insulator | |
| Atoms often lose protons but seldom lose or gain electrons. | F |
| A surface that loses electrons becomes positively charged. | T |
| The flow of charges between two objects is called static electricity. | T |
| The plastic or rubber around copper wires is an insulator because it allows the flow of electrons. | F |
| What characteristics of copper and aluminum causes them to be good conductors? what is the affect of this? | They both have many free electrons and most electric wires are made up of copper and aluminum. |
Created by:
Ayanna021201
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