5.2B

What does an LDR do when exposed to increased light levels?

• Emits light

• Absorbs light

• Resistance increases, blocking current flow

• Resistance decreases, allowing more current to flow

What is the primary use of a thermistor?

• Measuring temperature

• Detecting moisture

• Generating light

• Amplifying signals

Which component is used as a temperature sensor in fire alarms?

• Thermistor

• Transistor

• Microprocessor

• LED

What happens to the resistance of a moisture sensor as moisture level increases?

• Resistance increases

• Resistance remains constant

• Resistance decreases

• Sensor emits light

What is the function of a Single Pole Single Throw (SPST) switch?

• Acts as an on-off switch

• Detects light levels

• Changes resistance levels

• Amplifies electrical signals

What is the main material used in the manufacture of microprocessors?

• Aluminium

• Copper

• Gold

• Silicon

Which device converts electrical energy into rotary motion?

• Resistor

• LED

• Switch

• Motor

What is the primary characteristic of a piezoelectric sensor?

• Converts physical pressure into electrical charge

• Emits light when electrically charged

• Changes color with temperature variations

• Increases resistance with temperature

What does a microcontroller typically contain?

• A mechanism to detect moisture

• A light-emitting component

• Processor cores, memory, and I/O peripherals

• A system to generate heat

What is the main use of gold in electronic components?

• To store data

• To make electrical connections without soldering

• To increase the weight of devices

• To detect light