# need help with calculation.

Discussion in 'General Electronics Discussion' started by needy, Sep 27, 2009.

1. ### needy

4
0
Aug 13, 2009
hi guys i'm stuck on two calculations i kind of have an idea but not exactly sure and would love to find how to calculate the following

Q1. Two resistors R1 and R2 are are parralel connected to a voltage source. If R1 has a value of 50ohms and and a current of 2.0 amps

1 . what is the voltage across R2? = is it 100v
2. and is the supply voltage 100v?

Q2. A series circuit has three resistors, if the voltage across R1 is 4volts, R2 is 5volts and R3 is 6 volts

1. The circuit voltage is 10 volts, correct?
2. what (or how do i find) the resistance value of R2 if R1 has 2.0 amperes flowing through it?

2. ### Resqueline

2,848
2
Jul 31, 2009
Q1: U=I*R, 2*50=100, Parallell=same voltage.

Q2: How do you figure 10V? 4+5+6=15, Series=same current, R=U/I, R2=5/2=2.5 ohms.

Ask a Question
Want to reply to this thread or ask your own question?
You'll need to choose a username for the site, which only take a couple of moments (here). After that, you can post your question and our members will help you out.
Continue to site