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T/F: A switch is a conductor that can be moved to bridge the gap or not bridge the gap in a circuit.
True
T/F: Magnetic force is strongest at the center of the magnet.
False; poles
T/F: Televisions use an electric current called a series circuit to carry information when broadcasting programs.
False
T/F: Magnets and static electricity are similar because they both attract and repel objects.
True
T/F: Electromagnets are much weaker than other magnets.
Which unit measures how much current flows through a given part of a circuit in one second?
ampere (amp)
A(n) _____ has multiple paths for electricity to travel.
parallel circuit
Which unit measures power, or how fast work is done?
watt
A _____ is a material that can work as a conductor or as an insulator.
semiconductor
A material that reduces the flow of electricity is called a(n) _____.
resistor
A liquid or paste substance that conducts electricity is called a(n) _____.
electrolyte
The _____ acts like the brain of the computer.
CPU
Another name for an integrated circuit is a(n) __________.
microchip
Any material that has the ability to attract iron is called a(n) _____.
magnet
This computer part stores facts temporarily.
RAM
A very small circuit with all the parts built into it is called a(n) ________.
integrated circuit
These people discovered that moving a magnet around or through a loop of wire produces electricity in the wire.
Joseph Henry and Michael Faraday
This person discovered that adding a metal core to a coil of wire increases the magnetism.
William Sturgeon
This computer part contains the built-in memory and programs, or long-term memory.
ROM
This person discovered that current traveling through a wire produces a weak magnetic field in the live wire.
Hans Christian Oersted
Explain why buildings have electrical wiring arranged in parallel rather than series circuits.
If the wiring of an entire building is on a series circuit, every time a break in the circuit occurred, every electrical device would stop working. A problem in a series circuit is harder to find than one in a parallel circuit.
If someone has fallen onto a high voltage electric fence and is getting shocked, would it be safer for rescue workers to use a metal pole or a wooden stick to pull him away from the fence? Explain your answer.
The wooden stick would be safer. Metal is a conductor and would allow the electricity to flow to the rescue worker. Wood is an insulator.
Describe why a broken bulb affects a series circuit but not a parallel circuit.
In a series circuit, electricity can follow one path only. If a bulb breaks, then the circuit breaks. A parallel circuit has another path for the electricity to flow. If a bulb breaks, the other bulbs remain lit.
When too many appliances have been plugged into one place, this causes a fuse to blow or the breaker to trip in the house. What happened to the circuit? Why did it happen?
The circuit opened and did not allow electricity to flow through it. It protects the house from short circuits which could cause a fire.
A maglev train uses a(n) __________.
electromagnet