If a charge of -3 x 10-6 C were allowed to fall through a potential difference of +500 V, the change in potential energy for the charge would be
A. -1.5 × 10-3 Joules.
B. 1.5 × 10-4 Joules.
C. -1.5 × 10-4 Joules.
D. 1.5 × 10-3 Joules.
Answer: A
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What resistance is needed in a series circuit with a 20-mH coil and 1.0-?F capacitor for a total impedance of 100 ? at 1.5 kHz?
A) 0.16 k? B) 57 ? C) 18 ? D) 82 ?
If ? = 24 V, at what rate is thermal energy generated in the 20-? resistor?
a.
13 W
b.
3.2 W
c.
23 W
d.
39 W
A cart starts with velocity v and rolls up the frictionless path shown. At what point is the kinetic energy greatest?
A. 1
B. 2
C. 3
D. 4