Rain Alarm Circuit Quiz

What is the main purpose of a rain alarm circuit?

• To detect smoke

• To detect rainwater and trigger an alert

• To measure temperature

• To generate electricity

What happens when water touches the rain sensor in the circuit?

• The resistance increases

• The circuit remains off

• The transistor turns on, activating the buzzer

• The circuit becomes an open circuit

What happens when the zinc and copper electrodes are placed inside the potato?

• The potato glows

• A chemical reaction generates electricity

• The potato becomes hard

• The potato starts melting

What type of transistor is commonly used in a rain alarm circuit?

• MOSFET

• PNP Transistor

• NPN Transistor

• SCR

What is the function of a resistor in the rain alarm circuit?

• To store electrical charge

• To regulate current flow and protect components

• To amplify the signal

• To detect water levels