How Much Current Is Needed to Heat the Filament Enough

question 18

Multiple Choice

How much current is needed to heat the filament enough to produce a 100 to 1000 mA tube current?

• A) 1 A to 10 A
• B) 5 A to 7 A
• C) 1 mA to 10 mA
• D) 5 mA to 7 mA

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