| What is a Diode and what is its Role? | -Made from a Semiconductor [Silicon] it only allows a Free Current in One Direction, but not in the Other |
| What is a Semiconductor? | -This is a Material that can Conduct Electricity better then Insulators [Glass] but Less then Conductors [Copper]
-This can be Altered via Impurities
-Silicon is an Amazing Example |
| Where are Diodes Used? | -Solar Panels
-Radio Receivers
-Can be Used to get Direct Current via an Alternating Supply |
| What is an LDR, What is its Role? | -This is an Resistors that well Depends on Light Levels
-Darkness means the Resistance is High, Peak of Light Levels means the Resistance is Low |
| Where are LDR's Used? | -Automatic Night Lights
-Outdoor Lighting
-Burglar Detectors |
| What is a Thermistors, and what is its Role? | -This is a Resistor, that depends on Temperature
-Hot Conditions see the Resistance Low
-Cold Conditions see the Resistance High
-Constant Conditions are Curved, Increased Current = Temperature Increase = Lower Resistance |
| Where are Thermistors Used? | -Thermostats
-Irons
-Car Engines |
| What is a Sensing Circuit used for? | -They are used to Turn on, or Increase the Power to Components via the Conditions there In. |
| Tim has a Series Circuit that has [In Order] a
Power Supply, Thermistor, Fixed Resistor and a Fan [Fan and Resistor are Parallel]
Explain What is Going On in this Sensing Circuit? | -So lets Clear some Facts. The Potential Difference will be the Same for the Fixed Resistor and the Fan, Because they're Parallel.
-The Power Supply Shares out its Potential Difference [Volts] with the Thermistor and the Fixed Resistor/Fan according to the Resistance
-If a Component had a High Resistance, it would have a High Potential Difference
-So if that Circuits Surroundings gets Hotter, The Thermistors Resistance would Decrease, Meaning the Potential Difference it had to play with is Less, and is Given out to the Fixed Resistor and the Fan. [They're Still Parallel]
-The Fan with its Extra Potential Difference would Spin Faster. |
| Lola has a Series Circuit that has [In Order] a
Power Supply, Fixed Resistor, LDR and a Bulb [The LDR and Bulb are Parallel]
Why would the Bulb, in this Circuit, be Bright at Darkness? | -So we Know that High Resistance = High Potential Difference and that LDR's Resistance is Very High at Darkness.
-However, since the Bulb is Parallel to That LDR, It gets the Perks to Have that High Potential Difference [Because its Shared]
-Therefore having the Energy to be Bright. |
