The absolute value of the electric potential at a distance of 4 m from a certain point charge is 200 V. What is the absolute value of this potential at a distance of 8 m from the same point charge?
A) 50 V
B) 400 V
C) 100 V
D) 200 V
E) 600 V
C
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The fundamental force that is the principal cause of what we experience as frictional forces is:
A. gravitational force B. electromagnetic force C. weak force D. strong force
A metal rod of length L in a region of space where a constant magnetic field points into the page rotates clockwise about an axis through its center at constant angular velocity ?. While it rotates, the point(s) at highest potential is(are)
a.
A.
b.
B.
c.
C.
d.
D.
e.
A and E.
Phase Angles: The phase angle in a series RL circuit at 1.0 kHz with a 0.20-k? resistor and a certain inductor is 40°. What is the inductance in this circuit?
A. 84 mH B. 74 mH C. 27 mH D. 37 mH E. 58 mH
You toss a ball to your friend. When the ball reaches its maximum altitude, its velocity is
A) zero. B) horizontal. C) 9.8 m/s2. D) vertical. E) 9.8 m/s.