Electric Circuits
What happens to the total voltage across a parallel combination of identical resistors when another identical resistor is added in parallel?
If a capacitor in an RC circuit is replaced with another capacitor having double the capacitance, how will the time constant of the circuit change?
What is the unit of electric current?
If you double only one resistor's resistance in a parallel circuit at steady state, what happens to its individual power consumption?
A capacitor with capacitance C within a steady-state circuit has stored energy W; how will this energy change if its capacitance were doubled while keeping voltage constant?
In a series LRC circuit at resonance, what relationship between current and voltage would cause power factor to equal unity?
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?

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How does an insulator affect an electric circuit if placed between two conducting wires?
If you double the distance between two point charges, what effect does this have on the electric force between them?
What happens to the total energy in a simple closed circuit with a resistor and no other components when it reaches steady state?