What is the radius of the electron orbit in a singly ionized ...

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What is the radius of the electron orbit in a singly ionized helium ion?
 
  What will be an ideal response?

Question 2

Consider two transformers. Transformer A has 300 turns on its primary and 500 turns on its secondary. Transformer B has 250 turns on its primary and 1000 turns on its secondary.
 
  The same voltage is supplied at the primary of both transformers. The secondary voltage in transformer A has an amplitude V = 50 V. What is the amplitude of the secondary voltage on transformer B?
  A) 120 V
  B) 2400 V
  C) 1200 V
  D) 60 V
  E) 240 V

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Answer to Question 1

0.027 nm

Answer to Question 2

A

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