A parallel plate capacitor is charged to 12 V and the voltage source is then disconnected. When the air space between the plates is then filled with a dielectric of constant 6.0, what is the resulting voltage between the plates?
A. 72 V
B. 12 V
C. 6.0 V
D. 2.0 V
E. none of these choices are correct
D. 2.0 V
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Jake pulls on a 25-kg cart with a constant force of 50 N. What is the wagon's acceleration?
A) 0.2 m/s2 B) 2.0 m/s2 C) 5 m/s2 D) 20 m/s2 E) 200 m/s2
The average density of the Galilean satellites of Jupiter ________ with increasing distance from the planet.
A. does not change B. increases C. decreases
What is the sign of these fields’ curl component at point P on each diagram in the direction facing us? (Hint: Draw a cross-sectional view of a small curl-meter centered on the point in question, and sketch the magnetic field vectors at the midpoint of each of the curl-meter’s four sides in the drawing’s plane. Don’t worry about how we might create such a magnetic field.)
A. The component of the curl in this direction is positive.
B. The component of the curl in this direction is negative.
C. The component of the curl in this direction is zero.
Materials in which the electrons are bound very loosely to the nuclei and can move about freely within the material are referred to as
A) insulators. B) conductors. C) semiconductors. D) superconductors. E) polar.