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# Science Chapter15

### Electricity

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