A current flowing through a long, straight wire causes a magnetic field that points
A. along concentric circles around the wire.
B. radially outward from the wire.
C. radially inward toward the wire.
D. along the wire.
Answer: A
You might also like to view...
The water level in a reservoir is maintained at a constant level. What is the exit velocity in an outlet pipe 3.0 m below the water surface?
a. 2.4 m/s b. 3.0 m/s c. 5.4 m/s d. 7.7 m/s e. 49 m/s
A container is filled with a mixture of helium and oxygen gases. A thermometer in the container indicates that the temperature is 22°C. Which gas molecules have the greater average kinetic energy?
A) It is the same for both because the temperatures are the same. B) The oxygen molecules do because they are diatomic. C) The oxygen molecules do because they are more massive. D) The helium molecules do because they are less massive. E) The helium molecules do because they are monatomic.
SHM may be written y = A sin( ?t + ? ). What is the value of ?, the phase constant, when:
(a) the initial displacement is zero? (b) the initial displacement is A? (c) the initial velocity is zero?
Satellites in low-Earth orbits are more likely to crash to Earth when the sunspot cycle is near solar maximum because ________
A) of increased magnetic interference B) it is too dangerous to send the Space Shuttle to service satellites during solar maximum C) they are more likely to have their electronics "fried" by a solar flare during solar maximum D) Earth's upper atmosphere tends to expand during solar maximum, exerting drag on satellites in low orbits