The silicon-controlled rectifier (SCR) is often referred to as a PNPP junction.
Answer the following statement true (T) or false (F)
False
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Calculate the value of ZL in the circuit of Fig. 11.50 in order for ZL to receive maximum average power. What is the maximum average power received by ZL?
 FIGURE 1.png)
As compared with grinding an unhardened workpiece of the same material, what change in the selection of the grinding wheel would be desireable for grinding the workpiece in a hardened condition?
A) A different type of abrasive is indicated, such as silicon carbide instead of aluminum oxide B) The grinding wheel selection should be one grade softer C) No change in wheel bonding is desired D) The grinding wheel selection should be one grade harder
The air quality of a confined space must be monitored _____________________.
A. before entering B. while work is being done C. for the first 30 minutes of the work D. a and b
Hint: 
In the circuit shown 
is 135 volts and 
is 175 volts. Find 
. Carry the answer to two decimal places.
Fill in the blank(s) with the appropriate word(s).