Voltage Lab

Q: What is the primary function of the Voltage Divider Rule (VDR)?

To calculate voltage across individual elements in a series circuit.

Q: What is the formula for calculating the voltage across a resistor (R1) in a resistive voltage divider?

V_R1 = V_s * (R_1 / (R_1 + R_2))

Q: How does the VDR apply to inductive circuits?

The formula remains the same, using inductance values instead of resistance.

Q: Does the Voltage Divider Rule change when applied to capacitive circuits?

Yes, but the principle stays the same.

Q: What is the key difference when applying VDR in AC circuits with reactive components?

The phase of the voltage is considered.

Q: What happens if a component in a series voltage divider fails open (becomes an open circuit)?

The total current in the circuit goes to zero.

Question 1 of 15

What is the primary function of the Voltage Divider Rule (VDR)?

The VDR is specifically used to determine the voltage drop across each component in a series circuit.

Question 2 of 15

In a series circuit with two resistors (R1 and R2), the total voltage (Vs) is 10V, R1 is 2 ohms, and R2 is 8 ohms. What is the voltage across R1?

VR1 = Vs * (R1 / (R1 + R2)) = 10V * (2 / (2 + 8)) = 2V

Question 3 of 15

The VDR is most applicable to which type of circuit configuration?

VDR is used for circuits where components are connected in series.

Question 4 of 15

If you have a 12V source and two series resistors, and you want 4V across the second resistor, what should be the ratio of the second resistor's value to the total resistance?

VR2 = Vs * (R2 / (R1 + R2)), therefore R2/(R1+R2) = 4V/12V = 1/3.

Question 5 of 15

In a purely resistive voltage divider, what happens to the current as the resistance of a component increases?

In a series circuit, the current is the same through all components. Increasing resistance changes the voltage drop across the component, not the overall current.

Question 6 of 15

What is the formula for calculating the voltage across a resistor (R1) in a resistive voltage divider?

This is the core formula for the Voltage Divider Rule.

Question 7 of 15

How does the VDR apply to inductive circuits?

The principle of VDR applies using inductance values for inductors in series.

Question 8 of 15

What is the equivalent of resistance in a voltage divider when dealing with inductive components?

In the context of the VDR, inductance values are used instead of resistance in inductive circuits.

Question 9 of 15

If two inductors are in series, and L1 = 10 mH and L2 = 20 mH, and the source voltage is 30V, what is the voltage across L2?

VL2 = Vs * (L2 / (L1 + L2)) = 30V * (20mH / (10mH + 20mH)) = 20V.

Question 10 of 15

Does the Voltage Divider Rule change when applied to capacitive circuits?

The principle stays the same, using capacitive reactance instead of resistance or inductance.

Question 11 of 15

In a series RC circuit, the voltage across the resistor is 6V and the voltage across the capacitor is 8V. What is the source voltage?

Since the voltages are out of phase, the source voltage is the vector sum: sqrt(6^2 + 8^2) = 10V

Question 12 of 15

What is the key difference when applying VDR in AC circuits with reactive components?

In AC circuits with reactive components, phase angle becomes significant, affecting voltage division.

Question 13 of 15

Which of the following is NOT an application of the voltage divider?

Voltage dividers always reduce the voltage; they cannot increase it.

Question 14 of 15

What happens if a component in a series voltage divider fails open (becomes an open circuit)?

An open circuit breaks the current path, stopping current flow.

Question 15 of 15

A voltage divider is made with R1 = 100 ohms and R2 = 200 ohms, supplied by a 9V source. What is the voltage across R2?

VR2 = Vs * (R2 / (R1 + R2)) = 9V * (200 / (100 + 200)) = 6V

Voltage Divider Rule Challenge