A 40.0 ? resistor is connected in parallel to a 13.0 ? resistor. These are joine

Question

A 40.0 ? resistor is connected in parallel to a
13.0 ? resistor. These are joined in series to a
9.00 ? resistor and a source with a potential
di?erence of 40.0 V.

Calculate the equivalent resistance.
Answer in units of ?


Calculate the current in the third resistor.
Answer in units of A

Calculate the current in the first resistor.
Answer in units of A

Calculate the current in the second resistor.
Answer in units of A

Calculate the potential di?erence across the
?rst resistor.
Answer in units of V

Explanation / Answer

1.Reqv = (R1R2/R1+R2)+ R3 = 40x13/53 + 9 = 18.81 ohms 2. i = V/R1 = 40/9 = 4.44 amps 3. i = V/R1=40/40 = 1 amp 4. i =V/R2= 40/13 = 3.07 amps 5. v =IR =1X 40 = 40 volts

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