The Black Box Mystery event is composed of two activities related
to electrical circuits.
- Teams will be given a series of simple electrical circuit diagrams
for which the teams must predict whether or not a light bulb will
light up if certain switches will be open or closed.
- Teams will be provided with a sealed black box with three single-pole,
single-throw switches. The way in which the switches are wired
is hidden. Teams will also receive an identical unwired open box
which will have to be wired in the same way the black box is wired.
||To learn some circuit theory.
||Teams of two or three.
- Each group must provide eight pieces of insulated bell wire
each 10 cm long with bared ends
- A small flat-headed screwdriver with a blade no larger than
- A simple "circuit tester": Pre-wire a battery and
bulb assembly as shown in the diagram below. Any type of battery
and bulb may be used, but care should be taken to insure that
the battery is fresh and that the bulb is compatible with the
voltage of the battery! The loose leads should be at least 10
- Each group will be provided with a wired Black Box containing
three switches and an identical unwired switch box.
- Detailed instructions for each group will be provided in a
sealed envelope which must not be opened until the starter calls
- Contestants must not break or damage the seal in their mystery
- Both part A and part B of the event must be handed in together
to receive bonus for speed.
- If the event is not completed within 30 minutes, marks will
be awarded for partial completion.
- Electrical Circuit Diagrams (16 points)
- Observation and Circuit Diagram (13 points)
- Completed Black Box Circuit (5 points)
- Fastest Time of Completion: 1st (6 points); 2nd (4 points);
3rd (2 points)
- Note: 34 points out of 40 will be awarded for successful completion
of this event. Up to 6 points will be awarded for speed of completion.
||Youth Science Foundation Science Olympics