If * Find . * If changes to , find . * For what value of will voltages V(B),V(E),V(C) get back to previous values. ================================================== Here's what I got. If R(B) changes to 270k: Here comes the 'problem', finding Beta... I calculated using the previous (first) V(B) value. So If V(C) gets back to the previous value, I(C) should be the same. And . But I realized I can find Beta with another method, using K-laws. using: and the value of I(C) found first, I get: Can anyone tell me if any of the solutions is right or wrong and why. Thanks in advance.