The Main Reason That Alternating Current Replaced Direct Current for General

question 31

Multiple Choice

The main reason that alternating current replaced direct current for general use is:

• A)ac generators do not need slip rings
• B)ac voltages may be conveniently transformed
• C)electric clocks do not work on dc
• D)a given ac current does not heat a power line as much as the same dc current
• E)ac minimizes magnetic effects