A 120-V rms voltage is applied across a 6.0-?F capacitor. If the frequency of the generator is 60 Hz, what is the rms value of the current in the circuit?
A) 0.17 A B) 0.37 A C) 0.27 A D) 0.47 A E) 0.071 A
C
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Lightning is dangerous to humans because lightning strokes
a. carry large currents. b. have high voltages. c. have no resistance. d. fry whatever they hit.
A thermodynamic process that happens very quickly tends to be
a. isobaric. b. isothermal. c. isovolumetric. d. adiabatic.
Which statement below regarding the First Law of Thermodynamics is most correct?
a. A system can do work externally only if its internal energy decreases. b. The internal energy of a system that interacts with its environment must change. c. No matter what other interactions take place, the internal energy must change if a system undergoes a heat transfer. d. The only changes that can occur in the internal energy of a system are those produced by non-mechanical forces. e. The internal energy of a system cannot change if the heat transferred to the system is equal to the work done by the system.
Faraday's Law: A single-turn loop of wire, having a resistance of 8.00 ? and a cross-sectional area 200 cm2, is perpendicular to a uniform magnetic field that increases steadily from 0.200 T to 2.800 T in 2.20 seconds. What is the magnitude of the induced current in the loop?
A. 2.95 A B. 3.18 A C. 0 A D. 3.18 mA E. 2.95 mA