Electric Circuits
What happens to the total voltage across a parallel combination of identical resistors when another identical resistor is added in parallel?
The total voltage across each branch remains unchanged.
The total voltage doubles across each branch.
The total voltage increases across each branch.
The total voltage decreases across each branch.
In a circuit containing only ideal capacitors and batteries where the batteries provide constant voltage, what would be the effect on the stored energy if all capacitor values were suddenly doubled?
The stored energy would halve.
The stored energy would double.
The stored energy would remain constant.
The stored energy would quadruple.
A capacitor initially charged to its maximum capacitance discharges entirely through an ohmic resistor until there is zero volts across the terminals. What happens to the thermal energy generated during the discharge process?
It transforms exclusively into electromagnetic radiation, predominantly in the visible spectrum range of frequencies observed by eyesight.
It gets converted primarily into heat in the surrounding environment, according to the rules of thermodynamics.
It stays stored in the capacitive device and is available for future recharging purposes, defying the conventions known in science today.
It gets converted mainly into kinetic form, causing physical motion of objects nearby the vicinity of the contact point.
What type of current is used in a steady state circuit analysis?
Direct Current (DC)
Pulsating Direct Current (PDC)
Transient Current
Alternating Current (AC)
In a series LRC circuit at resonance, what relationship between current and voltage would cause power factor to equal unity?
Current and voltage are in phase.
Current leads voltage by 90 degrees.
Voltage leads current by π/2 radians.
Current lags voltage by π radians.
When comparing two light bulbs connected in series versus two identical ones connected in parallel to an ideal battery, how do their brightnesses compare assuming bulb resistance remains constant?
Brightness cannot be determined without knowing specific values for voltage and resistance.
Bulbs are brighter in parallel compared to when they're in series.
Series-connected bulbs are brighter due to increased power dissipation.
Both configurations result in equally bright bulbs because total power used is conserved.
Which of the following best defines resistance in a conductor?
A variable that increases or decreases current by varying magnetic field.
A measure of how difficult it is for electrons to move through the material.
The capacity of material to carry electric charge without resorting to electron flow.
The amount of potential energy converted to kinetic energy in electrons.

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If a charged particle moves with constant velocity through a uniform magnetic field that is perpendicular to the velocity, how will the kinetic energy of the particle change over time?
It will increase due to acceleration by the magnetic force.
It will remain constant since the magnetic force does no work.
It will decrease as a result of radiated electromagnetic energy.
It will oscillate because of the periodic motion in the magnetic field.
What would be the variation in cutoff frequency if one were to add another identical capacitor in parallel to an existing low-pass RC filter circuit?
The cutoff frequency remains unchanged.
The cutoff frequency cannot be determined without additional information about the circuit resistance values.
The cutoff frequency decreases due to increased effective capacitance.
The cutoff frequency increases due to decreased effective capacitance.
How does an insulator affect an electric circuit if placed between two conducting wires?
It transforms AC into DC in the circuit.
It prevents or significantly reduces current flow between them.
It increases the current flow between them.
It has no effect on current flow between them.