RC series circuit

An RC eries circuit has a voltage source of 10Vac, a resistor of 10ohms, and a capacitor with an impedance of -j10ohms. How do I find the magnitude and phase angle of the current flow through the capacitor?

Transformers

A 4:1 step-down transformer uses a 60Vac source on the primary windings. There is 120mA flowing through the load resistance on the secondary windings. How do I find the resistive load?

Op-amp and RC circuit analysis

For the following circuit (see attachment), how do I find the Laplace transform of the transfer function V0(s)/V1(s)? Would this be considered a low or high pass filter?

Transfer Function

Find the transfer function IL/Vs for the following circuit in the attached file.

Circuit analysis

Refer to the attached circuit: Assume ideal voltage source. Find a) Vbg; b)I2