When the DC input voltage increases, how does it affect the voltage drop across R2 in a circuit?

When the DC input voltage increases, the voltage drop across R2 increases due to Ohm's Law, which states that the voltage drop (V) across a resistor is equal to the current (I) flowing through it multiplied by the resistance (R), expressed as V = I * R.

In a simple series circuit, an increase in the total input voltage will lead to a higher total current in the circuit if the resistance remains constant. Since R2 is still part of the same circuit, the increase in current flowing through R2 will result in a larger voltage drop across R2.

This relationship is key in understanding how components interact in a circuit. As the input voltage rises, so does the current (assuming the load has not changed), and thus the voltage across R2 also rises proportionally according to its resistance. Therefore, the response detailing that the voltage drop across R2 will increase accurately reflects the behavior observed in such electrical circuits.