v = 
(cos y + sin z)
v = (cos y + sin z)
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¿Cuál de las siguientes opciones define mejor a un circuito paralelo?
a. Es un circuito de combinación. b. Toda la corriente debe fluir a través de todas las cargas. c. Cada carga está conectada en una vía de corriente individual del circuito. d. Todas las cargas están conectadas una después de otra.
Find the Norton equivalent for the circuit in Fig. 13.84 at terminals a-b.
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In the refrigeration system, the compressor, condenser fan, and evaporator fan ________
A) are each controlled by separate controls B) are all turned on and off by the thermostat C) can be turned off by the defrost switch or the high pressure switch D) all the above E) only B and C
Answer the following statement(s) true (T) or false (F)
1. A bonding jumper for a supplemental grounding electrode is required to be not smaller than 14 AWG. 2. The NEC defines the term ground as “the earth”. 3. A chassis ground provides safety from ground faults and possible short circuits. 4. The grounding electrode conductor is typically green in color. 5. A metal gas pipe is a suitable ground but only for communication equipment operating at 30V or less.