Final control1an scr with a 5v gate trigger level is used, Ask an Expert

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Final Control

1. An SCR with a 5V gate trigger level is used with a 12V zener diode, and the capacitor is 0.15uF. What value of R2 will give full control of the power to the load down to zero?

2. A stepping motor has 120 steps per revolution. Find the digital input rate that produces 10.2 rev/s.

3. What force is generated by a 85 kPa acting on a 25 cm2 area diaphragm?

4. Find the proper valve size in inches for pumping a liquid flow rate of 580 gal/min with a maximum pressure difference of 50 psi. The liquid specific gravity is 1.3.

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