Show:
Round and Round
Safety First
Ohmmmm
Its Magnetic
Picture This
100
a battery with a wire connecting one terminal to another is an example of this (it also occurs when two bare wires of a circuit come in contact with each other)
What is a short circuit? (these are very dangerous - recall that without a resistor or load there is nothing to slow the flow of charge so the wire heats up very quickly and can cause things to catch on fire and/or damage the battery)
100
this should never be placed under a rug since walking on it can break it or remove the insulation causing a fire
What is a current carrying wire?
100
According to Ohms law if I increase the number of resistors in a circuit but keep the power source (voltage the same) then the current will _____________. Hint V I R
What is decrease?
100
this is the area around a magnetic material where the magnetic properties of the material can be measured or effect other materials with magnetic properties
What is a magnetic field?
100
If these two poles of a magnet are placed near one another the magnets repel. (in a picture of the magnetic field you would see the field lines move away from one another and a little gap where there was no field.
What is like poles or what is North and North or South and South?
200
one path for electrical current to flow or a circuit where the loads are placed one after another in "line" with the battery
What is a series circuit?
200
when removing an electrical plug from the outlet you should never pull on this part because it could break or damage the plug creating a potential shock or fire hazard
What is the wire? (always remove electrical plugs using the plug itself never pull it out by the wire part)
200
According to Ohms law if I increase the force which pushes the electrical charge through the circuit (voltage increases - example increase the number of batteries used to power the circuit) but keep the number of resistors in the circuit the same the current will _____________. Hint V I R
What is increase?
200
this is the area on a magnet where the magnetic field is the strongest?
What are the poles?
200
This end of the compass is attracted to the magnetic south pole of the Earth but really points to Geographic NORTH!
What is north pole?
300
in this circuit if one bulb goes out the others will stay lit (more modern holiday light strings are wired this way)
What is a parallel circuit?
300
when the current flow in a circuit is too high or too fast we call this a(n)
What is overload or electrical overload?
300
Use Ohms law to solve this: An electrical circuit has a power source with voltage 12V and a single 1.5 ohm resistor. What is the current in the circuit? Hint V I R
What is 8 Amperes or 8 A or 8 Amp?
300
if we map the magnetic field of a bar magnet using arrows, the arrows would start on the ________________ pole of the magnet and go towards the __________________ pole of the magnet
What is north and south?
300
If iron filings are sprinkled over a bar magnet they align with this and we see lots of "lines" curving from one end of the bar magnet to the other
What is magnetic field?
400
this type of power source causes electrical current to "flow" in one direction
What is direct current?
400
This reusable device is placed in series with the power source and acts like a switch to open the circuit and stop the flow of current if there is an overload (or the current is too high to be safe). This devices is designed to protect the equipment in the circuit not the people using the electrical equipment.
What is a circuit breaker?
400
An electric oven receives 240 V of electricity. if it uses 32 amperes of current, what is the resistance of the oven? Hint V I R
What is 7.5 ohms?
400
This is the name we use to refer to the Earth's magnetic field
What is the magnetosphere?
400
If these two poles are placed near one another and we looked at the magnetic field you would see "lines" connecting one pole to the other
What is opposite poles or North and South?
500
This type of power source you use in your house or office it causes the electrical charges to "swish back and forth or alternate direction" in the circuit
What is alternating current?
500
This device can only be used once but it is placed in series with the power source and can stop the flow of electricity if there is an overload (or the electrical charge is flowing to quickly through the circuit)
What is a fuse?
500
A generator is connected to a circuit. The resistance in the circuit is 5 ohms and the current is 50 amps. What is the voltage of the generator? Hint V I R
What is 250V?
500
These are little areas of magnetism within a material which are caused by spinning electrons in the atoms of the material. When the material is placed in a magnetic field these often can be "aligned" with the magnetic field causing the material to be magnetized.
What is magnetic domain or domain?
500
A picture with only one path from the battery through each load would represent a _______________, while a picture with loads set up looking like a ladder with the battery (more than one path for the current to travel) would represent a _______________
What is a series circuit and parallel circuit?