ATL Quiz - Grade 7

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

• Increases

• Decreases

• Stays the same

• Fluctuates

If a bulb and a resistor are connected in series, how does the brightness of the bulb compare to when it's connected alone?

• Brighter

• Dimmer

• No change

• Flickering

In a series circuit with a bulb and a resistor, what determines the total resistance?

• The resistance of the bulb only

• The resistance of the resistor only

• The sum of the resistances of the bulb and the resistor

• The difference between the resistance

What is the purpose of a soil moisture sensor in a gardening system?

• To measure soil temperature

• To monitor moisture levels in the soil

• To measure soil pH levels

• To monitor air humidity

What happens to the output reading of a soil moisture sensor when the soil becomes dry?

• Increases

• Decreases

• Stays the same

• Becomes erratic

Where should the soil moisture sensor be placed for accurate readings?

• On the surface of the soil

• Buried in the soil

• Suspended above the soil

• Placed in water

What does an LDR (Light Dependent Resistor) do when the light level increases?

• Its resistance increases

• Its resistance decreases

• Its resistance stays the same

• Its resistance fluctuates randomly

Which type of circuit component is an LDR?

• Capacitor

• Inductor

• Resistor

• Transistor

What is a common application of an LDR in everyday devices?

• Light sensors in streetlights

• Temperature control in refrigerators

• Speed control in fans

• Power regulation in solar panels

What is one of the primary uses of the BBC Micro?

• Playing high-end video games

• Learning to code and create digital projects

• Browsing the internet

• Making phone calls