The sky appears to be blue during the day because:
1.Air absorbs blue light less than other frequencies (i.e., acts like a blue filter).
2.Air molecules emit blue light after being struck by sunlight.
3.The sky reflects blue light from the oceans.
4.The temperature high in the Earth's upper atmosphere is 1000 K.
5.None of the above.
[Ques. 2] The Sun appears to be yellow when overhead because:
1.The human eye is most sensitive to yellow.
2.Yellow frequencies are transmitted better through the atmosphere.
3.Air does not absorb yellow frequencies.
4.The temperature of the Sun is 6000 K.
5.More than one of the above.
6.None of the above.
[Ques. 3] A particular object appears to be red. The reason it appears red is:
1.It absorbs only red frequencies as they hit.
2.It reflects only red frequencies as they hit.
3.It absorbs red frequencies more than other frequencies.
4.It reflects red frequencies more than other frequencies.
5.It emits red frequencies more than other frequencies.
6.Not enough information.
[Ques. 4] Consider the following circuits. Two identical batteries are connected to two identical inductors as shown. The switches are closed for a very long time.
At t = 0, both switches are opened. Which resistor dissipates more total energy after the switches are opened?
1.The 1 resistor in A dissipates more energy.
2.The 2 resistor in B dissipates more energy.
3.Both resistors dissipate the same amount of energy.
4.The amounts of energy dissipated cannot be compared.
[Ques. 5] Consider the circuit below. Switch S is closed at t = 0
What is the current through inductor
L long after the switch is closed?
1.0
2.1 A
3.2 A
4.3 A
5.4 A
6.5 A
7.6 A
8.9 A
9.None of the above
10.Impossible to determine
[Ques. 6] Consider the circuit below. Switch S is closed at t = 0
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