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a 40 - ohm resistor and 20 - ohm resistor are connected in parallel in a circuit. what is the total resistance?

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Solution:

[tex]R_{T} = \dfrac{R_{1}R_{2}}{R_{1} + R_{2}}[/tex]

[tex]R_{T} = \dfrac{(40 \: ohm)(20 \: ohm)}{40 \: ohm + 20 \: ohm}[/tex]

[tex]\boxed{R_{T} = 13.33 \: ohm}[/tex]

[tex]\\[/tex]

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