Question

resistor, which equation describes the resistor current? Oooo If the voltage v = 150 sin(5001 - 75°) is impressed across a 25 O 6 sin(500t - 15°) 3 sin(500t +15°) 6 cos(5001 - 165) O 6 sin(500t -75°)

Answer 1

Solution :

If a voltage is pressed against a resistor then its phase angle will always remains same as resistor never changes phase of impressed voltage or current , that is only done by capacitor and inductor , so for this question the right answer will be the last option . The maximum value of current is calculated by divding 150 by 25 which is 6 ,hence the correct  answer will be 6sin(500t-75) .