Project 4: Fundamentals of Circuit and Light Diffusion-KC

What is "polarity" in an LED circuit?

• The direction of the electrical current

• The brightness of the LED

• The strength of the battery

• The type of switch used

What is the function of an LED in an electrical circuit?

• It converts electrical energy into light energy

• It stores electrical energy like a capacitor

• It increases voltage in the circuit

• It controls the speed of electrical flow

What happens when an LED is connected in reverse polarity?

• It will emit brighter light

• It will not work because current cannot flow in the wrong direction

• It will start to heat up but still function

• It will store energy and release it later

What role does the coin cell battery play in the lightsaber circuit?

• It generates electricity through a chemical reaction

• It stores electricity like a capacitor

• It acts as a resistor to control current flow

• It converts mechanical energy into electrical energy

How does the translucency of the straw affect the brightness of the lightsaber blade?

• A more translucent straw diffuses light better, making it brighter.

• A more translucent straw blocks light, making it dimmer.

• A translucent straw does not affect brightness but changes color.

• The translucency of the straw does not impact the brightness at all.

What is the purpose of using a battery holder in the circuit?

• It increases the battery’s voltage output

• It safely connects the battery to the LED and allows for easy replacement

• It controls the amount of current reaching the LED

• It changes the color of the LED

Why do we use a straw over the LED in the DIY lightsaber?

• To help spread and diffuse the light evenly

• To conduct electricity to the LED

• To protect the LED from overheating

• To reflect all the light in one direction

Why do LEDs require a specific voltage and current to function correctly?

• Too much voltage can burn out the LED, while too little won’t light it up

• LEDs can function at any voltage and current

• Higher voltage makes the LED last longer

• The LED generates its own electricity and does not need a power source

What is the best way to test if an LED is working before assembling the full circuit?

• Submerge it in water
  

• Place the LED directly on the battery with the correct polarity

• Hit it gently to see if it lights up

• Wrap it in aluminum foil to conduct electricity

Why is electrical tape used over the copper tape connection in the circuit?

• To enhance electrical conductivity between components

• To insulate and protect the connection, preventing short circuits

• To increase the voltage supplied to the LED
  

• To cool down the battery and prevent overheating