Programming and Assembling - Light Dependent Resistor Quiz

What is the function of a Light Dependent Resistor (LDR)?

• C. It produces sound when light is detected

• D. It measures temperature changes

• B. It varies its resistance based on the amount of light

• A. It emits light when exposed to darkness

What are the practical uses of an LDR sensor?

• C. Playing music based on light intensity

• B. Counting packages on a conveyor belt

• D. Measuring air pressure

• A. Detecting temperature changes

What happens to the resistance of an LDR when the light intensity increases?

• D. It becomes infinite

• C. It increases

• B. It decreases

• A. It remains the same

What type of circuit is formed between the LDR and a resistor?

• C. Potential divider circuit

• B. Parallel circuit

• A. Series circuit

• D. Open circuit

What is the purpose of the relay in a light activated switch circuit?

• C. To control the LED brightness

• D. To switch the circuit on or off

• B. To regulate the light intensity

• A. To amplify the light signal

What is the role of the transistor in the light activated switch circuit?

• D. To switch the relay on or off

• C. To amplify the light signal

• B. To measure temperature

• A. To detect sound levels

What is the function of a Potentiometer?

• A. To measure light intensity

• B. To vary resistance in a circuit

• C. To generate electricity

• D. To store data

What is the main advantage of using solar energy in society?

• C. It is renewable

• B. It is unreliable

• A. It is expensive

• D. It causes pollution

What is the purpose of the buzzer in the warning light circuit?

• A. To produce light

• B. To detect extreme light

• C. To generate sound

• D. To switch the LED on or off

What does the Arduino function analogRead() do?

• C. Measures the current in a circuit

• B. Writes data to a pin

• D. Controls the speed of a motor

• A. Reads the voltage on a pin and returns a value