Understanding Resistance, Reactance, and Impedance

What is resistance primarily considered as in the context of electron flow?

• A friction against the motion of electrons

• A gravitational pull on electrons

• A force that accelerates electrons

• A magnetic field around electrons

How is resistance measured?

• In amperes

• In ohms

• In volts

• In watts

What is the phase angle between voltage and current in a pure resistor?

• 0 degrees

• 45 degrees

• 90 degrees

• 180 degrees

How is reactance different from resistance?

• Reactance is the magnetic field around a conductor

• Reactance is the acceleration of electron flow

• Reactance is the friction against electron motion

• Reactance is the inertia against changes in current and voltage

In a capacitive circuit, how does the current relate to the voltage?

• Current is opposite to voltage

• Current is in phase with voltage

• Current lags voltage by 90 degrees

• Current leads voltage by 90 degrees

In a capacitive circuit, where is the voltage placed in the phaser diagram?

• Along the positive X-axis

• Along the negative Y-axis

• Along the positive Y-axis

• Along the negative X-axis

What is the phase relationship between voltage and current in an inductive circuit?

• Voltage and current are opposite

• Voltage leads current by 90 degrees

• Voltage lags current by 90 degrees

• Voltage and current are in phase

What is the formula for calculating capacitive reactance?

• 1 over 2 pi times frequency times capacitance

• 2 pi times frequency times inductance

• Voltage divided by current

• Current divided by voltage

What does impedance represent in an electrical circuit?

• The sum of all forms of opposition to electron flow

• The speed of electron flow

• The magnetic field strength

• The gravitational force on electrons

In an RL circuit, what is the phase angle between voltage and current?

• Undefined

• Positive

• Zero

• Negative