Study for Science test magnetism and electricity
Terms
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- Like charges do what to each other?
- Repel
- True or False: A Car is shielded from electrical strikes?
- True
- Acrylic or glass rods lose electrons when rubbed with what?
- plastic
- Why are static charges not used to power things?
- because there is no continuous flow
- Potential difference is measured in what?
- volts
- What does the equation E=Pt stand for?
- Energy=Power times time
- Unlike charges do what to each other?
- Attract
- What does the equation I=V/R stand for?
- Current=Volt/Resistance
- What does the equation P=Vi calculate?
- Power
- How does a electroscope react when touched if charged?
- it will ground or remove the charge from the electroscope
- Increasing coils in an electromagnet does what to its strength?
- Increases
- What is resistance measured in in the equation I=V/R?
- Ohms
- What is the second rule of the rules of resistance?
- a long wire offers more resistance than a short one
- What are the Van Allen Belts?
- Two regions of trapped charged particles in the magnetosphere
- What are some uses for capacitors(TYPE VARIES WHEN DONE WITH THIS QUESTION!)
- varies
- What is induced magnetism?
- Process of making an object temporarily magnetized by placing it in a magnetic field
- What is a series circuit?
- A circuit which only has one path for a current to flow
- What is a direct current?
- An electric current which occurs when electrons flow in the same direction
- What is a parallel circuit?
- A circuit which as two or more pathways for a current to flow
- KNOW YOUR CIRCUIT DIAGRAMS!!! TYPE DONE ONCE YOU HAVE READ THIS
- done
- What does the equation E=Pt stand calculate?
- Energy
- What does the equation I=V/R calculate?
- Current
- If electrical charges are moved 3 times as far apart the force between them becomes 9 times weaker(WE NEED TO KNOW THIS! TYPE DONE FOR THE ANSWER)
- done
- What is the first rule of the rules of resistance?
- a thin wire offers more resistance than a thick one
- When a current flows through resistance, the energy of the electrons will do what?
- slow down
- What do you get when you break a bar magnet in three pieces?
- three new magnets all witha north and south pole
- Where is the magnetic force strongest at?
- The poles
- What is solar wind?
- charged particles ejected from the sun
- What is the third rule of the rules of resistance?
- Electricity tends to seek the pathway of least resistance
- What is a alternating current?
- A current which electrons change direction of their flow many times
- What does the equation P=Vi stand for?
- Power=Voltage times current
- Why do the aurora borealis exist?
- The interaction of solar winds in the polar cusp of the magnetopshere
- Why does an object become charged?
- an atom loses or gains electrons which creates a positive or a negative charge