Electric Circuits and Voltage Dividers Quiz

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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?

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?

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?

400 Ω Signup and view all the answers

In the context of a voltage divider using a photoresistor, what does the voltage output depend on?

The amount of light striking the photoresistor Signup and view all the answers

What does the circuit shown in Figure 4 aim to demonstrate?

How to achieve a desired voltage using resistors Signup and view all the answers

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?

By choosing the right combination of resistors Signup and view all the answers

What does a light meter, like the one shown in Figure 5, measure?

Illuminance based on light intensity Signup and view all the answers

What is the main function of a photoresistor used in electronic circuits like light meters?

To convert light intensity into resistance changes Signup and view all the answers

Why is it essential to choose resistors carefully in a voltage-divider circuit?

To achieve specific voltage levels across resistors Signup and view all the answers

Electric Circuits and Voltage Dividers Quiz

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Questions and Answers

What is the equation that represents the current in the given circuit?

In a voltage-divider circuit, what does the desired voltage represent?

Why does the voltage output of a voltage divider using a photoresistor depend on the amount of light striking the photoresistor?

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?

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?

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?

Why is it essential to choose resistors carefully in a voltage-divider circuit?

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