The force exerted on a current-carrying wire located in an external magnetic field is directly proportional to which of the following?
a. current strength
b. field strength
c. both A and B
d. None of the above are valid.
c
You might also like to view...
The event in the life of a star that begins its expansion into a giant is
A) the core reaches a temperature of ten million degrees B) as much as 90% of the star explodes violently C) almost all the hydrogen in its core that was hot enough for fusion has been turned into helium D) the star's internal structure reaches equilibrium for the first time in its life E) it reaches the stage that astronomers call the zero-age main sequence
What effect or effects would be most significant if the Moon's orbital plane were exactly the same as the ecliptic plane?
A) Solar eclipses would be much rarer. B) Solar eclipses would be much more frequent. C) Total solar eclipses would last much longer. D) both A and C E) both B and C
What elements do astronomers consider heavy elements?
A) all elements besides hydrogen and helium B) elements that are heavier than iron C) elements that are heavier than uranium D) elements that are heavier than hydrogen E) elements that are heavier than carbon
A European sports car dealer claims that his product will accelerate at a constant rate from rest to a speed of 100 km/h in 6.00 s. What distance will the sports car travel during the 6.00-s acceleration period? (Hint: First convert speed to m/s.)
a. 41.7 m b. 58.3 m c. 83.3 m d. 167 m e. 125 m