Energy

Know the following for Tuesday's test:

• VOCABULARY

  • SOLAR INSOLATION

    • Solar insolation is how much sunlight is reaching the surface of the Earth. 

  • CURRENT

    • Flow of energy

  • VOLTAGE

    • Electromotive force or potential force, expressed in volts

  • RESISTANCE

    • Measure of difficulty for energy to pass an electric current, measured in Ohm’s

  • OHM’S LAW

    • V=IR

    • Finding voltage, but can be used to find current or resistance

  • POWER

    • P=VI

    • Measured in watts

  • PHOTOVOLTAIC CELL

    • Semiconductor that turns visible light into direct current, creating energy.

  • TURBINE

    • A machine that produces constant energy, revolving when force from water, air, steam, gas, or other fluid forces it to rotate, creating energy. 

• ENERGY USE

  • Power: watts

  • Kilowatts: divide watts by 1,000

  • Kilowatt/hour: multiply kilowatts by hours per day, kilowatt/hour/day

• CIRCUITS

  • PARALLEL

    • Circuit with resistors on parallel connections to the circuit

    • If one resistor goes out, the rest will continue to work since they are all still connected to the power source.

    • Find resistance: make the ohm’s the denominator, 1 the numerator, and add the fractions. Then find the reciprocal. 

  • SERIES

    • Circuit with resistors all connected on the same wire, one square circuit formation.

    • If one resistor goes out, all of the other resistors will stop working because there is a break in the circuit. 

    • Find resistance: Just add the ohm’s. 

  • SOLVING OHM’S LAW PROBLEMS

    • V=IR

      • When given resistance and current, multiply them to get voltage

    • I=V/R

      • When given voltage and resistance, divide the voltage by resistance to get current

    • R=V/I

      • When given the voltage and current, divide the voltage by current to get resistance

    • P=VI

      • When given the voltage and current, multiply them to get power, in watts. 

• TYPES OF RENEWABLE ENERGY

  • SOLAR

    • A renewable energy source coming from the sun; solar panels set outside obtain this energy

  • WIND

    • Large turbines set outside are spun by the wind, generating the power.