Wednesday

April 23, 2014

April 23, 2014

Posted by **Rony** on Thursday, February 18, 2010 at 12:56pm.

-What is the total resistance of the load?

-What is the current in R3

-What is the potential difference across R2?

- physics -
**drwls**, Thursday, February 18, 2010 at 1:09pmFirst get the effective resistance of R1 and R2 in series. It is 24 ohms. That in parallel with 8 ohms has an overall circuit resistance Reff geiven by

1/Reff = 1/24 + 1/8 = 4/24 = 1/6

Therefore Reff = 6 ohms.

The total current going through the circuit (battery) is

I = V/Reff = 1.0 amperes.

The total current going through the R1 and R2 is V/(R1+R2) = 6/24 = 0.25 A

The potential drop across R2 is

0.25A*9 ohms = 2.25 V

**Related Questions**

calculus - please help! - If two resistors R1 and R2 are connected in parallel, ...

PHY [non-calc] - Resistors R1= 10ohms, R2= 40 ohms and R3= 70 ohms are connected...

Physics - Consider the LR circuit. We have R1=9 Ohms, R2=5 Ohms, R3=19 Ohms, V=2...

Physics - Consider the LR circuit. We have R1=19 Ohms, R2=23 Ohms, R3=23 Ohms, V...

physics - so i have a circuit (series) where the the emf=12 V and R1=2 ohms and ...

physics-series and parellel circuits - I'll try to explain the schmatic drawing...

circuits - so i have a circuit (series) where the the emf=12 V and R1=2 ohms and...

algebra - express R as rational expression 1/R=1/R2+1/R2+1/R3 R FOR R1=5 OHMS R ...

physics - A battery of emf and negligible internal resistance is connected to ...

Algebra 2 - A resistor has a resistance of 15 ohms. What size of resistor, (r2...