1. What is the effect on the load voltage as the loading increases (i.e., as Rload decreases)?
2. What is the effect of adding the capacitor across the load?
3. How do the load voltages as measured by the DMM compare to those measured with the oscilloscope? Is there a pattern between the pairs of measurements?
4. How would the load voltages change if the diode bridge is connected between one end of the secondary and the center tap instead of across the entire secondary?