Force on a Wire: A straight 1.0-m long wire is carrying a current. The wire is placed perpendicular to a magnetic field of strength 0.20 T. If the wire experiences a force of 0.60 N, what is the current in the wire?
A. 2.0 A
B. 1.0 A
C. 3.0 A
D. 4.0 A
E. 5.0 A
Answer: C
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Kepler's Laws: It takes the planet Jupiter 12 years to orbit the sun once in a nearly circular orbit. Assuming that Jupiter's orbit is truly circular, what is the distance from Jupiter to the sun, given that the distance from the earth to the sun is 1.5 × 1011 m?
A. 3.9 × 1011 m B. 5.2 × 1011 m C. 7.9 × 1011 m D. 9.7 × 1011 m E. 3.2 × 1012 m
What protects Earth from the high energy particles ejected from the Sun (the solar wind)?
a. the troposphere b. the stratosphere c. the exosphere d. the magnetosphere e. the Van Allen radiation belts
Where have scientists begun a concerted search for life outside of Earth?
A) the Moon B) Venus C) Mars D) Jupiter E) Titan
A galvanometer has an internal resistance of 100 ? and deflects full-scale at a current of 2.00 mA
What size resistor should be added to it to convert it to a millivoltmeter capable of reading up to 400 mV, and how should this resistor be connected to the galvanometer? A) 50.0 ? in series with the galvanometer B) 50.0 ? in parallel with the galvanometer C) 75.0 ? in parallel with the galvanometer D) 100 ? in series with the galvanometer E) 100 ? in parallel with the galvanometer