Which of the following is (are) the result of the interaction of changing electric and magnetic fields?
A. Satellite communication
B. GPS satellites
C. Wave propagation
D. Radio waves
D
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The voltage or potential energy difference across a resistor is called a voltage ____.
a. increase b. bump c. drop d. decline
What is the load for 40 non-dwelling unit receptacles? (Assume that the load is not continuous.)
a. 5,400VA b. 6,750VA c. 7,000VA d. 7,200VA
A systems engineer who invested wisely can retire now because she has $2,000,000 in her self-directed retirement account. Determine how many years she can withdraw (a) $100,000 per year, or (b) $150,000 per year (beginning 1 year from now) provided her account earns at a rate of 5% per year. (c) Explain why the increased annual withdrawal from $100,000 to $150,000 per year is important.
What will be an ideal response?
While troubleshooting a residential air conditioning system, the technician reads 24 volts across the compressor contactor coil, but the contactor does not energize. What is the most likely problem?
A. defective transformer B. defective contactor contacts C. defective contactor coil D. high-voltage fuse blown