Final answer:
A non-polarized capacitor can be connected to a DC circuit without regard for polarity, and will charge until it reaches full capacity, at which point current flow ceases. The capacitance value and voltage rating are important considerations for proper operation within the circuit.
Step-by-step explanation:
A non-polarized capacitor can indeed be connected to a DC circuit without worrying about the polarity of the connections. This is because non-polarized capacitors do not have a positive or negative side and can, therefore, handle charge movement in any direction. This characteristic makes them versatile for use in DC circuits where the direction of current is constant, unlike AC circuits where current direction alternates.
However, it's important to note that once the switch is closed in a DC circuit, the capacitor will begin to charge. Over time, the increasing charge on the capacitor plates leads to a buildup of like charges, creating a repelling force that opposes further charge flow, as delineated in Figure 21.37. This ultimately results in a situation where the current stops flowing once the capacitor reaches its full charge capacity or when the circuit is otherwise broken by a switch or additional resistance.
While non-polarized capacitors can be used indiscriminately in terms of polarity, the overall capacitance value and the voltage rating are still crucial parameters that must be considered when integrating the capacitor into a circuit. This ensures the capacitor operates within its intended specifications, preventing potential damage to the component or the circuit.