In general, which is denser: humid air or dry air?
A) Air density is not affected by humidity.
B) Dry air
C) Air density peaks at 50 percent relative humidity and decreases both above and below 50 percent relative humidity.
D) Humid air
B
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What type of energy conversion occurs when a battery is discharging?
What will be an ideal response?
All of these alternator components should be electrically tested, EXCEPT ________
A) Diodes B) Stator C) Rotor D) End Frame
Placing the negative on the electrode instead of the base metal is referred to as ____.
A. AC B. DCEN C. DCEP D. reverse polarity
A voltmeter is used to determine the voltage across a resistive element in the circuit of Figure P2.77. The instrument is modeled by an ideal voltmeter in parallel with a 120-k? resistor, as shown. The meter is placed to measure the voltage across R4. Assume R1 = 8 k?, R2 = 22 k?, R3 = 50 k?, RS = 125 k?, and iS = 120 mA. Find the voltage across R4 with and without the voltmeter in the circuit for the following values:
Assumptions:
The voltmeter behavior is modeled as that of an ideal voltmeter in parallel with a 120- k? resistor.