[List of Quiz Problems]     German version

L1 and L2 are bulbs (e.g. 5 V), D1 to D4 are diodes, S1 and S2 switches. The circuit is connected to AC (U=5 V, 50 Hz). 1. Which bulb will be on, in case only S1 is connected ? L1 only L2 only both none 2. Which bulb will be on, in case only S2 is connected ? L1 only L2 only both none 3. Which bulb will be on, in case both switches are connected ? L1 only L2 only both none    Enable JavaScript to get the solution.   [List of Quiz Problems] Last update 2000/09/17