This preview shows pages 1–3. Sign up to view the full content.
This preview has intentionally blurred sections. Sign up to view the full version.
View Full Document
Unformatted text preview: Answer: I 1 = 0 . 353 ,I 2 = 0 . 118 ,I 3 = 0 . 471 hint: The three segments share the same voltage drop, V 1I 1 R 1 = V 2I 2 R 2 = I 3 R 3 but by Kirchos theorem, I 1 + I 2 = I 3 we have 3 unknowns ( I 123 ) and 3 equations, so the problem can be uniquely solved. 1 5. Find the equivalent resistance between points a and b in Figure 2. Answer: 7 . 5 hint: R 2 and R 3 are in series, and their combination R 23 is in parallel with R 4 , and the whole triangle is in series with R 1 and R 5 . R ab = R 1 + R 234 + R 5 where R 234 = ( R 2 + R 3 ) R 4 R 2 + R 3 + R 4 6. An uncharged capacitor and a resistor are connected in series to a source of emf. If E = 9 V , C = 20 F , and R = 100, nd the time constant of the circuit Answer: 2 ms hint: The time constant doesnt concern the emf. = RC = 2 ms 2 Fig 1 Fig 2 3...
View Full
Document
 Winter '07
 BRIANKEATING
 Current, Energy

Click to edit the document details