Electric Charges
Field lines around a positive charge point in which direction?
Toward the charge, Away from the charge, In circles, or Upward only
What is away from the charge?
Moving electric charges create:
Gravity, Heat, A magnetic field, or Sound
What is a magnetic field?
Moving a magnet through a coil produces:
Heat, Electric current, Sound, Light only
What is electric current?
Current in a battery flows from:
negative to positive or positive to negative
What is positive to negative?
Wind turbines convert wind energy into:
What is electrical energy?
Two objects with the same type of charge will do what?
What is repel each other?
What happens to magnetic force as distance between magnets increases?
What is decreases?
Which change increases current in a coil?
Shorter wire, Longer wire, Smaller magnet, No movement
What is longer wire?
Which part controls current flow in a circuit?
Battery, Wire, Switch, or Bulb
What is switch?
Increasing turbine blade speed will:
Decrease electricity, Increase electricity, Stop electricity, or Do nothing
What is increase electricity?
If two negatively charged balloons are released near each other, how will they move?
What is away from each other?
How do magnetic poles interact?
What is Like repel, opposite attract?
Moving a magnet faster through a coil causes current to:
increase or decrease
What is increase?
The force on a wire in a magnetic field moves:
Same direction, Opposite direction, Perpendicular to current, or Randomly
What is perpendicular to current?
Adding more magnets to a generator will:
Decrease electricity or Increase electricity
What is increase electricity?
Field lines around a negative charge point in which direction?
Away from the charge, Toward the charge, Sideways, or Upward only
What is toward the charge?
Which tool shows that an electric current creates a magnetic field?
Compass, Ruler, Thermometer, or Stopwatch
What is compass?
A device that converts mechanical energy into electrical energy is called:
Motor, Generator, Battery, or Switch
What is generator?
Wire wrapped around a nail connected to a battery forms a:
Circuit, Generator, Electromagnet, or Resistor
What is electromagnet?
Increasing the length of copper wire will:
Decrease current or Increase current
What is increase current?
A positive test charge placed near a negative charge will move:
What is toward the negative charge?
Magnetic field lines travel from:
South to north, North to south, Center outward, Random directions
What is north to south?
Why does a still magnet not produce current in a coil?
No battery, No motion of magnetic field, Wire is broken, or Magnet too strong
What is no motion of magnetic field?
Which material best shows magnetic fields around an electromagnet?
Sand, Iron filings, Water, or Paper
What is iron filings?
A positive charge moving toward a negative plate will have its electric potential energy:
Increase or Decrease
What is decrease?