How to solve the problem?

Question

A potentiometer is a variable resistor that can be adjusted given the needs of the application. For a 24-volt circuit compute the resistance that should be set to obtain the following current levels:

a)  2 Amperes

b)  3 Amperes

c)  8 Amperes

Answer 1

In order to solve this problem you need to use Ohm's law which is V=IR where v is voltage, I is current, and R is resistance. As this question asks for resistance you need to rearrange the equation in terms of resistance which give R=V/I. After that, it is simply a matter of plugging in the given numbers as follows

a) R= 24/2= 12 Ohms

b) R=24/3= 8 Ohms

c) R=24/8= 3 Ohms