The unit of electric current, the ampere, is equivalent to which of the following?
a. V??
b. V/?
c. ??m
d. V/s
b
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Holograms appear three dimensional because
A. they are in color. B. they are transparent. C. they consist of Young double slits. D. they recreate wave fronts as if they came from the original source. E. of their spectral response to refraction.
Force on a Moving Charge: A proton moving with a velocity of 4.0 × 104 m/s along the +y-axis enters a magnetic field of 0.20 T directed towards the -x-axis. What is the magnitude of the magnetic force acting on the proton? (e = 1.60 × 10-19 C)
A. 8.0 × 10-15 N B. 3.9 × 10-15 N C. 2.6 × 10-15 N D. 0 N E. 1.3 × 10-15 N
Charge of uniform density 4.0 nC/m is distributed along the x axis from x = ?2.0 m to x = +3.0 m. What is the magnitude of the electric field at the point x = +5.0 m on the x axis?
a. 16 N/C b. 13 N/C c. 19 N/C d. 26 N/C e. 5.0 N/C
If you were to come back to our Solar System in 8 billion years, what might you expect to find?
A) a red giant star B) a white dwarf C) a rapidly spinning pulsar D) a black hole E) Everything will be pretty much the same as it is now.