6. IE The voltage across a resistor varies as V = (170 V)sin(100t). (a) Is...

6. IE •• The voltage across a resistor varies as

ΔV = (170 V)sin(100πt).

(a) Is the current in the resistor (1) in phase with the voltage, (2) ahead of the voltage by 90°, or (3) lagging behind the voltage by 90°?

(b) Write the expression for the current in the resistor as a function of time and determine the voltage frequency.