Podcast
Questions and Answers
What is the equation that represents the current in the given circuit?
What is the equation that represents the current in the given circuit?
- I = R ΔV (correct)
- I = 0.5R ΔV
- I = R + R ΔV
- I = 2R ΔV
In a voltage-divider circuit, what does the desired voltage represent?
In a voltage-divider circuit, what does the desired voltage represent?
- Voltage drop across resistor R2 (correct)
- Voltage drop across resistor R1
- Voltage drop across resistor R
- Total voltage of the circuit
Why does the voltage output of a voltage divider using a photoresistor depend on the amount of light striking the photoresistor?
Why does the voltage output of a voltage divider using a photoresistor depend on the amount of light striking the photoresistor?
- Because resistors change their resistance with light intensity (correct)
- Because photoresistors increase the battery capacity
- Because voltage varies with light in a series circuit
- Because light affects the current in the circuit
What is the resistance of a typical photoresistor when exposed to light?
What is the resistance of a typical photoresistor when exposed to light?
In the context of a voltage divider using a photoresistor, what does the voltage output depend on?
In the context of a voltage divider using a photoresistor, what does the voltage output depend on?
What does the circuit shown in Figure 4 aim to demonstrate?
What does the circuit shown in Figure 4 aim to demonstrate?
If you only have a 9 V battery, how can you produce a potential difference of 5 V across a portion of an electric circuit?
If you only have a 9 V battery, how can you produce a potential difference of 5 V across a portion of an electric circuit?
What does a light meter, like the one shown in Figure 5, measure?
What does a light meter, like the one shown in Figure 5, measure?
What is the main function of a photoresistor used in electronic circuits like light meters?
What is the main function of a photoresistor used in electronic circuits like light meters?
Why is it essential to choose resistors carefully in a voltage-divider circuit?
Why is it essential to choose resistors carefully in a voltage-divider circuit?
