Which of the following is not a role of phosphorus in the plant?
A) structure of fatty acids B) membrane stability
C) structure of RNA D) structure of DNA
A
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Which of the following statements is NOT correct?
A) All AB timers are more accurate than mechanical and electronic timers. B) All AB timer instructions operate in nearly an identical fashion. C) The accuracy of PLC timers can be affected by short scan time. D) The TON, TOF and RTO timers are all output instructions.
A 560 mH inductor is in series with a 100 ? resistor across a square wave dc source. The time required for It to reach its peak value in the circuit is
A) 5.6 ms B) 11.2 ms C) 28 ms D) 16.8 ms
It is best to have sketching paper that is as smooth as possible.
Answer the following statement true (T) or false (F)
The device that supplies electrons from one end of a conductor and removes them from the other end of the conductor is called the ____.
A. voltage source B. circuit C. pump D. terminal