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Electricity/EM Quiz 2 Review
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To focus on nearby objects, the eye muscles must (relax/contract)
contract
When voltage increases, current will....
increase
When resistance increases, the current will....
decrease
The voltage in a parallel circuit is the (same/different) everywhere in the circuit
same
To correct hyperopia (farsightedness), a _____ lens should be used
concave
In a house, when wiring to ensure if one lightbulb breaks, the others will keep using you should use a ______circuit
parallel
Which of the following is NOT needed in a circuit? A. a closed loop B. a switch C. conductor D. energy source
B. A switch
myopia (nearsightedness) is when the eyeball is too (short/long) and the image falls (in front of/behind) the retina
long, in front of
the lens at the front of the eye is called the _____________
cornea
When light travels through a more dense medium into a less dense one, the ray
refracts away from the normal
When light travels through a less dense to more dense medium, the ray ...
refracts towards the normal
What does this symbol represent?
cell
Which of the following would produce the greatest voltage?
D
If the bulb marked X burns out A. the other two bulbs become brighter B. none of the bulbs light C. the other two bulbs become dimmer D. the other two bulbs remain the same
d
Which electrolyte would result in the highest voltage? a. Milk b. Lemon Juice c. Salt Water
b. Lemon juice
The reflected image in a concave mirror is smaller or larger than the object?
smaller
The reflected image in a concave mirror is closer or further than the actual object?
closer
Describe what the reflected image would look like
Larger and upside-down
Describe what the reflected image would look like.
Smaller and upside-down
Which light bulb will be the brightest?
They will all have the same brightness
The angle of incidence is _________ to the angle of reflection
the same/equal
What does 3 represent?
battery
What does 1 represent?
lightbulb
Which electrode combination would result in a higher voltage? a. zinc and zinc b. zinc and copper
b. zinc and copper
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