The magnetic flux through a loop perpendicular to a uniform magnetic field will change
a. if the loop is replaced by two loops, each of which has half of the area of the original loop.
b. if the loop moves at constant velocity while remaining perpendicular to and within the uniform magnetic field.
c. if the loop moves at constant velocity in a direction parallel to the axis of the loop while remaining in the uniform magnetic field.
d. if the loop is rotated through 180 degrees about an axis through its center and in the plane of the loop.
e. in none of the above cases.
d
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Compound Microscope: A compound microscope consists of an objective lens of focal length f0 and an eyepiece that by itself produces an angular magnification 25.0. The microscope is designed so that the object to be viewed is on the left side of the objective lens and is focused in a plane that is 28.00 cm away from the right-hand (or inside) focal point of the objective lens. When properly adjusted, the eyepiece and the objective lens are 29.90 cm apart. The eyepiece magnification is based on an image at infinity and a near point at 25.0 cm. What is f0?
Fill in the blank(s) with the appropriate word(s).
A mass is attached to a fixed point by means of an ideal spring with zero unstretched length and is free to move in two dimensions
What would be the equivalent statement of Kepler's third law for this situation in the case of circular orbits around the fixed point?
When starting from rest at the bottom of a straight road with constant upward slope, Joan bicycles to the top 50.0 s ahead of Sally, whose travel time is 5.00 minutes. What is the ratio of Joan's acceleration to Sally's acceleration?
a. 0.694 b. 0.833 c. 1.20 d. 1.44 e. 6.00
A camera has a lens that has an adjustable film distance used for focusing purposes. When the object being photographed is at a very large distance, the distance from the lens to the film is 50.0 mm. What would be the lens-to-film distance for an in-focus object 2.00 m from the camera?
a. 66.7 mm c. 51.3 mm b. 40.0 mm d. 48.8 mm