State ONE difference between a diode and an LED.

here are the answers to the questions:

3.3) A diode allows current to flow in one direction only (when it is forward biased).

3.4) ONE difference between a diode and an LED is that an LED emits light when current flows through it, whereas a standard diode primarily rectifies current and does not emit light.

3.5) Besides acting as a switch, a transistor can also amplify electrical signals.

3.6) A transistor is useful in a sensor circuit because it can amplify the very small electrical signal produced by a sensor, making it strong enough to activate other components or circuits.

3.7) When light increases, the resistance of an LDR (Light Dependent Resistor) decreases.

3.8) When temperature increases, the resistance of a negative temperature coefficient (NTC) thermistor decreases.

3.9) ONE example where a touch or moisture sensor could be used is in an automatic irrigation system to detect soil moisture levels and water plants only when needed.

3.10) The main function of a capacitor in a circuit is to store electrical energy in an electric field.