Voltage Drops and Phase Relationships in Circuits

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What effect does an increase in current have on the magnetic field in a coil?

The magnetic field contracts and only affects the loop where the current is increasing.

The magnetic field expands and cuts across all the loops in the coil. (correct)

The magnetic field reverses direction and opposes the increase in current.

The magnetic field remains constant and does not affect the other loops in the coil.

What is the purpose of the core material in an inductor?

To increase the inductance of the coil. (correct)

To insulate the coil from external magnetic fields.

To provide structural support for the coil.

To decrease the inductance of the coil.

What is the effect of an induced current on the change in the original current?

The induced current opposes the change in the original current. (correct)

The induced current has no effect on the change in the original current.

The induced current reverses the direction of the original current.

The induced current amplifies the change in the original current.

What is the schematic symbol for an air-core inductor?

A coil with no lines across the top. Signup and view all the answers

What is the effect of forming a conductor into a loop or coil?

It increases the property of inductance. Signup and view all the answers

How do the loops in a coil affect each other?

The current in each loop affects all the other loops in the coil. Signup and view all the answers

What is the formula used to calculate the inductive reactance (XL) of a component in the circuit?

$XL = 2\pi fL$ Signup and view all the answers

What is the formula used to calculate the capacitive reactance (XC) of a component in the circuit?

$XC = \frac{1}{2\pi fC}$ Signup and view all the answers

What is the formula used to calculate the resistive current (IR) in the circuit?

$IR = \frac{V_{GEN}}{R}$ Signup and view all the answers

What is the formula used to calculate the capacitive current (IC) in the circuit?

$IC = \frac{V_{GEN}}{XC}$ Signup and view all the answers

What is the formula used to calculate the inductive current (IL) in the circuit?

$IL = \frac{V_{GEN}}{XL}$ Signup and view all the answers

What is the relationship between the individual branch currents and the total current drawn from the source (IT) in a parallel LCR circuit?

The total current is the sum of the individual branch currents. Signup and view all the answers

What is the relationship between the voltage drops across the components in a series LCR circuit?

The voltage drops are out of phase with the circuit current. Signup and view all the answers

How can we determine the voltage drops across the individual components in a series LCR circuit?

By measuring the current and impedance of each component using Ohm's law. Signup and view all the answers

What is the purpose of constructing a phasor diagram for a series LCR circuit?

To visualize the phase relationships among the components. Signup and view all the answers

What is the overall effect of reactance on the series LCR circuit described?

The overall effect is capacitive. Signup and view all the answers

How is the total equivalent reactance (Xeq) calculated in a series LCR circuit?

Xeq = XL - XC Signup and view all the answers

What is the value of the total equivalent reactance (Xeq) in the example series LCR circuit?

750 Ω Signup and view all the answers