Our solar system lies about how many light-years from the center of the nuclear bulge of the Milky Way?
a. 2400
b. 28,000
c. 110
d. 4.3
[Ques. 2] Which element was detected in the Sun before it was found on Earth?
a. Hydrogen
b. Promethium
c. Helium
d. Argon
[Ques. 3] A square loop (length along one side = 20 cm) rotates in a constant magnetic field which has a magnitude of 2.0 T. At an instant when the angle between the field and the normal to the plane of the loop is equal to 20 and increasing at the rate of 10/s, what is the magnitude of the induced emf in the loop?
a. 13 mV
b. 0.27 V
c. 4.8 mV
d. 14 mV
e. 2.2 mV
[Ques. 4] The longest diameter of the Milky Way is about how many light-years?
a. 10
b. 10,000
c. 100
d. 100,000
[Ques. 5] For a specific element, photons of how many different energies could be absorbed by electrons to jump from the n = 1 to n = 5 level?
a. 20
b. 10
c. 6
d. 1
e. 4
[Ques. 6] A 400-turn circular coil (radius = 1.0 cm) is oriented with its plane perpendicular to a uniform magnetic field which has a magnitude that varies sinusoidally with a frequency of 90 Hz. If the maximum value of the induced emf in the coil is observed to be 4.2 V, what is the maximum value of the magnitude of the varying magnetic field?
a. 59 mT
b. 62 mT
c. 65 mT
d. 68 mT
e. 31 mT
[Ques. 7] The estimated number of stars in the Milky Way is about how many billion?
a. 1 to 2
b. 100 to 200
c. 10 to 20
d. 1000 to 2000
[Ques. 8] For a specific element, photons of how many different energies could be emitted by electrons in the n = 4 level as they return to the n = 1 level?
a. 3
b. 5
c. 2
d. 6
[Ques. 9] A 40-turn circular coil (radius = 4.0 cm, total resistance = 0.20 ) is placed in a uniform magnetic field directed perpendicular to the plane of the coil. The magnitude of the magnetic field varies with time as given by B = 50 sin(10 t) mT where t is measured in s. What is the magnitude of the induced current in the coil at 0.10 s?
a. 50 mA
b. 1.6 A
c. 0.32 A
d. zero
e. 0.80 A
[Ques. 10] Which of the following is not a name used in the classification of galaxies?
a. Irregular
b. Regular
c. Spiral
d. Elliptical
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