Given: the voltage ratings of branch circuits that supply luminaires or receptacles for cord-and-plug-connected loads of up to 1400 volt-amperes or of less than 1/4 horsepower shall be limited to a maximum rating of 120 volts, nominal, between conductors. what is the maximum current calculated by this limitation

when a device is used in a circuit in which the voltage is 81 v, the current flowing through the device is 3 a. what is the resistance of the device?

a. 27 ω

b. 40.5 a

c. 243 ω

d. 243 a

the correct answer is a. 27

pythagoras' theorem

square root (-5^2+9^2)

square root (25+81)

square root (106)

angle is tan^-1(9/5)

neg x, pos y