An LCR circuit has resistance R0, inductance L0, and capacitance C0 . If the resistance value is now tripled, which values of inductance and capacitance will result in the same resonant frequency as before?
a. 3L0, C0 b. L0/3, C0/3
c. 3L0, 3C0 d. 3L0, C0/3
d
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The dielectric strength of rutile is 6.0 × 10^6 V/m, which corresponds to the maximum electric field that the dielectric can sustain before breakdown. What is the maximum charge that a 10-10-F capacitor with a 0.50-mm thickness of Rutile can hold?
a. 0.30 mC c. 0.60 µC b. 6.0 C d. 1.7 nC
A horse and rider travel in a region in which the vertical component of the Earth’s magnetic field is 0.035mT, while the horizontal component is 0.022mT. Attached to the horse’s bridle is a metal bit, a cylinder approximately 15cm long, in the horse’s mouth that is oriented horizontally. If the horse is galloping at 15m/s, what is the induced potential difference between the ends of the bit?
A. 79mV B. 93mV C. 50?V D. 93?V E. 50mV F. 79?V
In Europe, the combined Mississippian and Pennsylvanian periods are known as the
a. Carboniferous. b. Devonian. c. Pliocene. d. Tertiary.