A zener diode is normally used for voltage regulation. A zener diode, however, can also be used for high voltage spike protection if connected ________
A) Positive to anode, negative to cathode
B) Negative to anode, cathode to a resistor then to a lower voltage terminal
C) Positive to cathode, ground to anode
D) Both A and C
C
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____________________ welds are used when the strength of a full-length weld is not required, to speed up the welding process and reduce welding cost, to reduce welding heat distortion, or to help stop weld bead cracking.
Fill in the blank(s) with the appropriate word(s).
(a)Find the slope and deflection at A in Figure P7.11. (b) Determine the location and the magnitude of the maximum deflection in span BC. Solve by the moment-area method. Unless noted otherwise, EI is a constant for all members. Answers may be expressed in terms of EI unless otherwise noted.
How is a lockout relay in a control circuit reset?
a. Press a button on the relay. b. Automatically after system pressures equalize. c. Interrupt control circuit power. d. Automatically after 2 to 5 minutes.
When there is more demand for energy than fuel is available, it means that we are in an energy ____________________
Fill in the blank(s) with correct word