Electric Circuits
Which expression represents electrical power correctly if given quantities of electric potential difference V, charge Q, and time t?
Power =
Power =
Power =
Power =
What would happen to the power dissipated by a resistor if the voltage across it is halved and the resistance remains constant?
It remains constant.
It is halved.
It is doubled.
It is quadrupled.
In an RC circuit with a constant voltage source , how does quadrupling the capacitance affect the time it takes for the capacitor to charge to half of ?
It quadruples the time.
It doubles the time.
It has no effect on time.
It halves the time.
In analyzing an RLC series circuit at resonance driven by an AC source with variable frequency, what aspect crucially determines whether maximum power transfer occurs?
An optimal ratio between under conditions far from resonance promoting better energy storage cycling efficiency.
The absolute values of resistance regardless of whether resonance condition is met which maximizes dissipation through Joule heating.
The presence of minimal parasitic capacitances profoundly altering anticipated resonant conditions despite having nominal impacts typically.
The precise matching of source frequency with the natural resonant frequency of RLC combination leading to purely resistive total impedance.
How do you use Ohm's Law to calculate the consumed power (in watts) of a resistor whose known values are voltage (V) and current (I)?
More than watts
Exactly watts
Less than watts
Half watts
What is the total power consumed in an RLC circuit where the resistor (R), inductor (L), and capacitor (C) are connected in parallel to a voltage source with constant amplitude but variable frequency, and the resonant condition is exceeded?
The power consumed is greater than at resonance and cannot be determined without additional information about the relationship between frequency and the resonant condition.
The power decreases as the frequency increases beyond the resonant frequency.
The power is a sum of the powers in the three parallel components regardless of frequency changes.
The power consumed at any given frequency is equal to the power consumed at resonance.
A circuit consists of two identical resistors in series connected to a constant voltage source; if one resistor dissipates power , what total power does the voltage source supply?
4P
2P
P
P/2

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If a time-varying magnetic field is present within the loops of an ideal transformer, which of the following effects would dominate in determining the power output on the secondary side?
The self-inductance of the secondary coil only.
Capacitive reactance due to any incidental capacitance between windings.
Mutual inductance and transformer equations.
Resistive heating due to losses in the secondary circuit.
If a purely resistive AC circuit with resistance is operating at a peak voltage of and an angular frequency , what is the average power dissipated in the circuit?
1700 W
850 W
425 W
3400 W
What simplification occurs when using Gauss’ Law for electricity on charges distributed uniformly over an infinite plane?
Though uniformly charged, varying thicknesses across extended areas force more complex equations apply order accurately deduce resulting electromagnetic properties.
Infinite plane’s continuous spread mandates E-fields calculated every single region differently without any specific pattern emerging despite equal distribution.
Gauss' Law indicates that electrical flux through closed surface solely relies upon enclosed charge leading here, where charge density ’s constant, direct proportion relationship between E-field at surface.
Uniform distribution across infinite plane results us needing evaluate potential contributions each area fragment thus complicating total summation process required for E-field strength estimation.