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Author Question: A person having a near point of 25 cm uses a magnifying glass with a focal length of 10 cm. What is ... (Read 54 times)

kodithompson

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on: Jul 29, 2018
A person having a near point of 25 cm uses a magnifying glass with a focal length of 10 cm. What is the angular magnification of the glass for that person when her eyes are focused at infinity?
 
  A) 1.5
  B) 2.5
  C) 3.5
  D) 4.5

Question 2

A very long straight current-carrying wire produces a magnetic field of 20 mT at a distance d from the wire. To measure a field of 5 mT due to this wire, you would have to go to a distance from the wire of
 
  A) 16d.
  B) 8d.
  C) 4d.
  D) 2d.
  E) d .


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ghepp

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Reply #1 on: Jul 29, 2018
Answer to Question 1

B

Answer to Question 2

C


kodithompson

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Reply 2 on: Jul 29, 2018
Wow, this really help

xiaomengxian

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Reply 3 on: Yesterday
Thanks for the timely response, appreciate it

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