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SHOCK VALUE NM State Science Olympiad 2013 LED:NMSO Workshop 11/02/2012 1 SHOCK VALUE Event Parameters • Students are allowed to use any notes and/or calculators. • Notes must be 3-hole punched and secured in a 3-ring binder of any size. • Calculators cannot have any attached external probes or sensors. • The event supervisor provides any needed equipment. • Students may bring and use their own basic multimeters in place of event supervisor supplied ones. LED:NMSO Workshop 11/02/2012 2 SHOCK VALUE Competition Topics 1. Basic electrical DC circuit theory concepts of voltage levels • • • • • LED:NMSO Workshop 11/02/2012 current flow and direction, electrical pathways, volts, amperes, ohms, schematics, ohms law. 3 SHOCK VALUE Competition Topics 2. Basic electrical device concepts • • • • • • LED:NMSO Workshop 11/02/2012 battery polarity, parallel vs. series wiring of components, light bulb and motor connections, dry vs. wet cells. No semiconductors will be used. 4 SHOCK VALUE Competition Topics 3. Basic electrical circuit construction/ analysis • • • • LED:NMSO Workshop 11/02/2012 switches, power source, voltmeter measurements, light bulb/motor connections. 5 SHOCK VALUE Competition Topics 4. Basic magnetism concepts • • • • • LED:NMSO Workshop 11/02/2012 North and South poles, Earth's magnetic field, Electromagnet principles, magnetic vs. nonmagnetic materials, magnet shapes/types. 6 SHOCK VALUE Competition Topics 5. Basic magnetic applications • • • LED:NMSO Workshop 11/02/2012 use of a compass to determine directions/poles of a magnet, operation of an electromagnet, use of magnets in motors. 7 SHOCK VALUE • Competition must have at least one task or question from each of the five areas. • Competition must consist of both hands-on tasks and questions. • 50% of the score must be from hands-on tasks and 50% must be from the theoretical portion. • The event supervisor may provide some mathematical relationships. • Topics not included in the events are semiconductors, AC circuit theory and devices, capacitors, or inductors. LED:NMSO Workshop 11/02/2012 8 SHOCK VALUE Competition Format • There are two competition times: one for Even and the other for the Odd numbered teams (12 or 13 teams are competing in each time slot). • The competition will consist of six to seven stations through which the teams rotate. • There are at most two teams working at each station. • Each station focuses on one of the five areas. • Teams have about 6 minutes (depending on the number of stations) at each station. They are not permitted to return to a station. LED:NMSO Workshop 11/02/2012 9 SHOCK VALUE Task/Question Examples • Build a specified circuit. • Identify parallel or series circuits. • Measure voltage in a circuit. • Identify circuit symbols. • Questions about magnets. • Identify North and South poles of a magnet. LED:NMSO Workshop 11/02/2012 10 SHOCK VALUE Circuit Symbols LED:NMSO Workshop 11/02/2012 11 SHOCK VALUE Series and Parallel Circuits LED:NMSO Workshop 11/02/2012 12 SHOCK VALUE Constructing Electrical Circuits • Construct a series circuit containing a battery, light bulb, and switch. • Construct a parallel circuit containing a battery, two light bulbs, and switch. LED:NMSO Workshop 11/02/2012 13 SHOCK VALUE Ohm’s Law V=IR Potential difference: V volts Current: I amps Resistance: R ohms LED:NMSO Workshop 11/02/2012 14 SHOCK VALUE Ohm’s Law Ohm’s law states that current is inversely proportional to resistance How much current flows through a lamp that has a resistance of 60 ohms when 12 V is connected across it? I = V/ R I = 12 V / 60 ohms = 0.2 amps LED:NMSO Workshop 11/02/2012 15 SHOCK VALUE Voltage Measurement LED:NMSO Workshop 11/02/2012 16 SHOCK VALUE Station Schedule Example LED:NMSO Workshop 11/02/2012 Time Period Station A 1 B 7 C 6 D 5 E 4 F 3 G 2 17 SHOCK VALUE QUESTIONS? LED:NMSO Workshop 11/02/2012 18 SHOCK VALUE ACTIVITIES Build a circuit Measure voltage with a multimeter LED:NMSO Workshop 11/02/2012 19