Why is the triac popular in industrial circuits?
What will be an ideal response?
The triac has become very popular in industrial circuits as an AC switch. Because it is a thyristor, it has the ability to control a large amount of voltage and current. There are no contacts to wear out, it is sealed against dirt and moisture, and it can operate thousands of times per second. The triac is used as the output device of many solid-state relays.
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A ratio of ____ between measurements made with a true RMS ammeter and an average value ammeter indicates no harmonic distortion.
A. 0.5 B. 0.75 C. 0.833 D. 1.0
Heat units are calculated by taking the average temperature for the month minus 50°F
Indicate whether the statement is true or false
The ____ contains a high-voltage generator that supplies current through the series resistors and the unknown resistance (R) to the two-coil assembly that operates the pointer.
a. megohmmeter b. macrohmmeter c. millohmmeter d. kilohmmeter
Which of the following does not produce a number with unit(s) equivalent to joules?
A. Multiplying a force in newtons by a distance in meters. B. Multiplying a pressure in pascals by a volume in cubic meters. C. Multiplying a mass in kilograms by a velocity in meters per second. D. Multiplying a force in kilonewtons by a distance in millimeters. E. All of the above produce numbers with units of joules.