If the area of the plates of a capacitor is increased, the amount of capacitance _____.
a. decreases
b. increases
c. stays the same
d. may increase or decrease
b. increases
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The final temperature of 10 kg of ice at 0°C mixed with 60 kg of water at 20°C in an insulated container is 5.5ºC. The net entropy change is nearest: (?h)melt = 340 kJ/kg, Cwater = Cp, water = 4.18 kJ/kg·ºC)
A) 1.25 kJ/K B) 0.95 kJ/K C) 0.55 kJ/K D) 0.35 kJ/K
Technician A says that the state of charge of a NiMH battery can be determined by measuring cell voltage. Technician B says that many factors should be considered in determining the state of charge of a NiMH battery, including temperature, output current, and cell voltage. Which technician is correct?
A) Technician A only B) Technician B only C) Both technicians D) Neither technician
What is the industry standard rate of through-the-evaporator airflow in CFM per ton for most air-conditioning equipment?
A) 400 CFM per ton B) 800 CFM per ton C) 2000 CFM per ton D) 1200 CFM per ton
The PIV for a bridge rectifier is
A) negative B) approximately VS(pk) C) approximately 4 VS(pk) D) approximately 2 VS(pk)