If the length of a wire is doubled while keeping the diameter constant, what hap
Practice Questions
Q1
If the length of a wire is doubled while keeping the diameter constant, what happens to its resistance? (2019)
It doubles
It halves
It quadruples
It remains the same
Questions & Step-by-Step Solutions
If the length of a wire is doubled while keeping the diameter constant, what happens to its resistance? (2019)
Step 1: Understand that resistance (R) is a property of a wire that affects how easily electricity can flow through it.
Step 2: Know that resistance is directly proportional to the length of the wire (L). This means that if you increase the length, the resistance increases.
Step 3: If the length of the wire is doubled, it means you have two times the original length.
Step 4: Since resistance is directly proportional to length, if the length is doubled, the resistance will also double.
Step 5: Therefore, if the original resistance was R, after doubling the length, the new resistance will be 2R.
Ohm's Law – Resistance is directly proportional to the length of the conductor, given constant cross-sectional area and material.
Material Properties – Understanding how resistance is affected by physical dimensions of a conductor.
