An op-amp integrator with R = 10 MΩ and C = 0.1 μF has an input voltage of Vin = 4 sin(100t) V applied to it. Assuming initial capacitor voltage is zero, calculate the time in which the magnitude of the output voltage Vo first reaches 20 mV.

For an inverting amplifier configuration with an open-loop gain of A = 105, input resistance R1 = 1 kΩ, and feedback resistance Rf = 100 kΩ, calculate the output voltage Vo if the input voltage is Vin = 0.7 sin(ωt) V.

A power supply having an output resistance of 1.5 Ω supplies a full load current of 500 mA to a 50 Ω load. What is the percentage voltage regulation of the power supply?