If the resistance in a circuit is doubled while keeping the voltage constant, wh
Practice Questions
Q1
If the resistance in a circuit is doubled while keeping the voltage constant, what happens to the current?
It doubles.
It halves.
It remains the same.
It quadruples.
Questions & Step-by-Step Solutions
If the resistance in a circuit is doubled while keeping the voltage constant, what happens to the current?
Correct Answer: Current will be halved.
Step 1: Understand Ohm's Law, which states that Current (I) equals Voltage (V) divided by Resistance (R). This can be written as I = V/R.
Step 2: Identify that in this scenario, the voltage (V) is constant, meaning it does not change.
Step 3: Recognize that if the resistance (R) is doubled, we can represent this as R becoming 2R.
Step 4: Substitute the new resistance into Ohm's Law: I = V/(2R).
Step 5: Compare this with the original equation I = V/R. Notice that I = V/(2R) is half of I = V/R.
Step 6: Conclude that if the resistance is doubled while keeping the voltage constant, the current will be halved.
Ohm's Law – Ohm's Law states that the current (I) in a circuit is directly proportional to the voltage (V) and inversely proportional to the resistance (R).
