Question

Technician A says high resistance causes an increase in current flow. Technician B says a higher than
normal voltage drop could indicate high resistance. Who is correct?

Answer 1

The correct statement is: a higher than a normal voltage drop could indicate high resistance. Technician B is correct.

Ohm's law

Ohm's law states that the current flowing through a metallic conductor is directly proportional to the voltage provided all physical conditions are constant. Mathematically, it is expressed as

V = IR

Where

V is the potential difference

I is the current

R is the resistance

Technician A

High resistance causes an increase in current flow

V = IR

Divide both side by I

R = V / I

Thus, technician A is wrong as high resistance suggest low current flow

Technician B

Higher than normal voltage drop could indicate high resistance

V = IR

Thus, technician B is correct as high voltage indicates high resistance

Conclusion

From the above illustration, we can see that technician B is correct

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