1180 trig

An AC current has a peak value of 70 amperes. Find the instantaneous value of the current at 20 degrees. Express the answer to the nearest hundredth.

• 0.64 A

• 23.94 A

• 204.67 A

• 4.89 A

An AC voltage has an instantaneous value of 50 volts at 60 degrees. Find the maximum voltage value of the wave.

• 57.74 V

• 43.30 V

• 0.017 V

• 0.87 V

Find the phase angle at which an instantaneous voltage of 200 volts appears in a wave with a peak value of 500 volts. Round the answer to the nearest degree.

• 7

• 24

• 311

• 90

If the line voltage across the reactance  is 50 volts and the line voltage  is 300 volts, what is the voltage across the resistance?

• 304 V

• 250 V

• 2200 V

• 296 V

What is the maximum peak value of a 60-hertz wave that has an instantaneous voltage of 22 volts 1.67 milliseconds before the end of one cycle? Round the answer to the nearest tenth.

• 37.4 V

• 36.1 V

• 12.9 V

• 100.2 V