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

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

• A. The voltage drop across R2 will decrease.
• B. The voltage drop across R2 will remain unchanged.
• C. The voltage drop across R2 will increase.
• D. The voltage drop across R2 will become zero.

Answer: (C)

In a circuit with resistors, the voltage drop across a resistor is governed by 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), or V = I * R. When the DC input voltage increases, this typically leads to an increase in the total current flowing through the circuit, assuming the resistance values remain unchanged. As the input voltage rises, the total current in the circuit will also increase due to the higher voltage potential driving the current through the circuit elements. Consequently, if R2's resistance remains constant, the increase in current will cause a corresponding increase in the voltage drop across R2. This is because the voltage across any resistor is directly proportional to the amount of current flowing through it, according to Ohm's Law. Therefore, when the DC input voltage increases, it results in an increased voltage drop across R2, reflecting the direct relationship between voltage, current, and resistance in electrical circuits.

In a circuit with resistors, the voltage drop across a resistor is governed by 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), or V = I * R. When the DC input voltage increases, this typically leads to an increase in the total current flowing through the circuit, assuming the resistance values remain unchanged.

As the input voltage rises, the total current in the circuit will also increase due to the higher voltage potential driving the current through the circuit elements. Consequently, if R2's resistance remains constant, the increase in current will cause a corresponding increase in the voltage drop across R2. This is because the voltage across any resistor is directly proportional to the amount of current flowing through it, according to Ohm's Law.

Therefore, when the DC input voltage increases, it results in an increased voltage drop across R2, reflecting the direct relationship between voltage, current, and resistance in electrical circuits.