Grade 7 ATL Quiz 2

What happens to the total resistance when a resistor is added in series with a bulb?

• Decreases

• Increases

• Stays the same

• Fluctuates

How is the voltage distributed between the bulb and the resistor in a series circuit?

• Equally divided

• Higher on the bulb

• Higher on the resistor

• It depends on their resistance

What effect does adding more resistors in series have on the current in the circuit?

• Increases the current

• Decreases the current

• Keeps the current the same

• This causes the current to alternate

How does a soil moisture sensor detect the water content in the soil?

• By measuring temperature changes

• By detecting electrical conductivity

• By measuring air humidity

• By weighing the soil

Why is it important to monitor soil moisture in agriculture?

• To adjust the pH level of the soil

• To ensure optimal water levels for plant growth

• To control the soil temperature

• To detect the presence of pests

What happens to the sensor reading when the soil is too wet?

• It gives a low-resistance

• It provides a high-resistance

• The sensor stops working

• It provides an erratic reading

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

• Increases

• Decreases

• Stays the same

• Fluctuates randomly

Which type of device commonly uses an LDR to control its function based on light?

• Electric heater

• Street lighting

• Water pump

• Fan

In what situation would you expect the highest resistance from an LDR?

• In bright sunlight

• In a dark room

• In a room with ambient light

• Under a fluorescent lamp

Which of the following programming environments is commonly used with Micro?

• Arduino IDE

• MakeCode

• Scratch

• Visual Studio Code