A circular loop of wire is in the plane of the paper. The south pole of a bar magnet is being moved from a position in front of the paper in a direction away from the center of the loop. The direction of the induced current in the loop
A)
is clockwise.
B)
is north.
C)
is counterclockwise.
D)
is south.
E)
cannot be determined.
C
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If the force on a body is halved then the acceleration of the body
a. increases by half b. increases by double c. decreases by half d. decreases by double
Most of the extrasolar planets found so far were detected by
A) receiving radio transmissions from them, much like Jupiter emits. B) noting the drop in the star's light as the planet transits its disk. C) imaging them with the HST in the infrared, where they are easier to stop. D) detecting the oxygen in their atmospheres spectroscopically. E) noting the Doppler shifts of the star as the planet orbits it from side to side.
White dwarfs are rare objects
a. True b. False Indicate whether the statement is true or false
A ray of light consisting of blue light (wavelength 480 nm) and red light (wavelength 670 nm) is incident on a thick piece of glass at 80°
What is the angular separation between the refracted red and refracted blue beams while they are in the glass? (The respective indices of refraction for the blue light and the red light are 1.4636 and 1.4561.) A) 0.27° B) 0.33° C) 0.36° D) 0.46° E) 0.54°