In block-diagram algebra, two cascaded blocks G1(s) and G2(s) have equivalent transfer function?

  • AG1+G2
  • BG1G2
  • CG1/G2 always
  • DG1-G2
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Correct Answer: B. G1G2
Explanation: Transfer functions of blocks in cascade multiply, giving G1(s)G2(s).
Reference: Standard control systems: block diagram reduction
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