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What is the formula for capacitance in terms of charge and voltage?
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The capacitance formula is C = Q/V, where Q is the charge and V is the voltage.
How does Ohm's Law relate voltage, current, and resistance?
Ohm's Law states that V = IR, where V is the potential difference, I is the current, and R is the resistance.
Explain how resistivity affects the resistance of a material.
Resistivity is a material property that affects resistance; higher resistivity results in higher resistance for a given size and shape of material.
What is the unit of resistance and its symbol in electrical circuits?
The unit of resistance is Ohms, symbolized by Ω.
What purpose do phasor diagrams serve in analyzing AC circuits?
Phasor diagrams visually represent the phase differences between voltage and current in AC circuits, aiding in understanding circuit behavior.
How does the current relate to the rate of voltage change in capacitive circuits?
In capacitive circuits, the current I = C(dV/dt), where C is the capacitance and dV/dt is the rate of change of voltage.
How can power delivered in a capacitive circuit be expressed?
Power in a capacitive circuit can be expressed as P = VC(dV/dt).
Why do conductors allow electrical flow while insulators do not?
Conductors have free electrons that easily move to allow electrical flow, whereas insulators do not have freely moving electrons.
Explain how resistance is affected by the length and area of a conductor.
Resistance is directly proportional to the length of the conductor and inversely proportional to its cross-sectional area, represented by the formula R = ρ(l/A).
In an inductive circuit, how is the phase relationship between voltage and current represented?
In an inductive circuit, voltage leads the current by 90 degrees in the phasor diagram.
Describe capacitance and its role in an electrical circuit.
Capacitance is the property of a material to store electric charge, measured in Farads.
What is the formula that represents the induced voltage in a coil with inductance?
The induced voltage is given by the formula V = L(dI/dt), where L is inductance and dI/dt is the rate of change of current.
What is the phase relationship between voltage and current in a capacitive circuit?
In a capacitive circuit, voltage lags the current by 90 degrees in the phasor diagram.
What is the formula to calculate power using Ohm's Law?
Power can be calculated using P = VI, or using Ohm's Law, P = I²R.
Define inductance and its effect on current changes.
Inductance is the property of a conductor that opposes changes in the magnitude or direction of the current.
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