A large volume of the solar system's space is occupied by
a. meteors.
b. micrometeoroids.
c. asteroids.
d. comets
[Ques. 2] Ohm's law gives the relationship between
a. current and voltage.
b. work and current.
c. current and charge.
d. force and current.
[Ques. 3] Monochromatic light ( = 500 nm) is incident on a soap bubble (n = 1.40). What is the wavelength of the light (in nm) in the bubble film?
a. 255
b. 500
c. 700
d. 357
e. 422
[Ques. 4] A comet consists of
a. a nucleus only.
b. a coma only.
c. a tail only.
d. all of these.
[Ques. 5] The unit for current is the
a. ampere.
b. ohm.
c. coulomb.
d. volt.
[Ques. 6] The electric fields arriving at a point P from three coherent sources are described by E1 = E0 sin t, E2 = E0 sin (t + /4) and E3 = E0 sin (t + /2). Assume the resultant field is represented by Ep = ER sin (t + ). The amplitude of the resultant wave at P is
a. E0.
b. 1.5E0.
c. 1.7E0.
d. 2.4E0.
e. 2.9E0.
[Ques. 7] The tail of a comet is shortest when the comet is
a. closest to the Sun.
b. farthest from the Sun.
c. closest to Earth.
d. farthest from Earth.
[Ques. 8] An object that is positively charged will
a. repel a rubber rod stroked with fur.
b. repel a glass rod stroked with silk.
c. be polarized.
d. none of these
[Ques. 9] In a double slit experiment, the distance between the slits is 0.2 mm and the distance to the screen is 100 cm. What is the phase difference (in degrees) between the waves from the two slits arriving at a point 5 mm from the central maximum when the wavelength is 400 nm? (Convert your result so the angle is between 0 and 360.)
a. 90
b. 180
c. 270
d. 360
e. 160
[Ques. 10] The tail of a comet is longest when the comet is
a. closest to the Sun.
b. farthest from the Sun.
c. closest to Earth.
d. farthest from Earth.
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