To keep the electrons together,the focusing cup
A) has a negative charge
B) has a positive charge
C) physically surrounds the electron cloud
D) A and C
E) B and C
Correct Answer:
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Q61: The space charge effect describes
A) how the
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A)filament circuit
B)primary
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A) heating the filament
B) heating
Q77: The purpose of the focusing cup is
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