Suppose a current is given by the equation l = 1.80sin 210r, where l is in amperes and t in seconds.
(a) What is the frequency?
(b) What is the rms value of the current?
(c) If this is the current through a 42.0-Ω resistor, write the equation that describes the voltage as a function of time. |

New search. (Also 5349 free access solutions) |