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☆☆☆☆☆Cards in this guide (15)
What do electric cells do
convert chemical energy into electrical energy
When is mechanical advantage increased by a first class lever
when the fulcrum is close to the load
Which of these are part of a wedge
two inclined planes,double wedge and single wedge
What do fixed pulleys always do
change the direction of force
How do devices that are powered by electricity work
The devices increase resistance.
What types of magnets are harder to magnetize but retain magnetism much longer
permanent magnets
What term is given to the process of rearranging electrons in a semiconductor by adding atoms of other elements
doping
How is the information on a CD read
as reflected light
Why are temporary magnets so useful
magnetic feilds are produced only when current is flowing
What is true about magnets
a magnet always has two poles
What would reduce resistance in a copper wire
making the copper wire thicker
What best describes an electric circuit
An electric circuit is best described as a loop.
the flow of electrons
Part of a lever on which effort force is applied
The effort arm of a lever is a part of the lever on which effort force is applied. Resistance arm of a lever is a part of the lever that exerts the resistance force.
What is the relation between Newton meter and watt
1 Watt = 1 Joule / Second = 1 Newton-meter / Second.
Which of these is needed to operate an electric motor
alternating current
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