Electric Circuits
Given Lenz’s law application, instantaneous power generated by an RL circuit with inductor L reactance varies time-wise majority due to two factors - what are they?
Changing magnetic flux through inductor and current flowing through resistor.
Initial current magnitude and voltage crossed large inductance.
Ohm's law's basic calculations plus capacitor dielectric permittivity.
Magnetic field strength within coil surrounding space.
How does total power supply in a series circuit compare to the sum of individual resistors' powers?
They are equal
The total power is greater than the sum
The total power is less than the sum
The total power cannot be determined without knowing the voltage
If a circuit contains two identical resistors in parallel with each resistor having a resistance of R ohms, what is the total power consumed by the entire circuit given voltage V applied across it?
P =
P =
P =
P =
What formula represents the power dissipated by a resistor?
P = I / R
P = V * I
P = V / I
P = I^2 * R
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.

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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.
In terms of energy consumption, what will happen if you replace an incandescent light bulb with an LED bulb having one-fourth of its wattage rating?
Energy consumption will halve since LEDs use less power but not proportionally to their wattage reduction.
Energy consumption will increase due to higher efficiency.
Energy consumption will decrease to one-fourth.
There would be no significant change in energy consumption.
If a straight wire carries a constant current, what is the relation between energy used by the wire and time?
The energy used is inversely proportional to time.
The energy used is equal to the square of the time.
The energy used is proportional to time.
The energy used does not depend on time.