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Author Question: A resistor operated at 120 V dc is rated at 1.40 kW. (a) What is the normal operating current ... (Read 32 times)

BRWH

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on: Jul 29, 2018
A resistor operated at 120 V dc is rated at 1.40 kW.
 
  (a) What is the normal operating current through the resistor?
  (b) What is the resistance of the resistor?

Question 2

The eyepiece of a compound microscope has a focal length of 2.50 cm and the objective has a focal length of 1.60 cm. The two lenses are separated by 15.0 cm. The microscope is used by a person with normal eyes (near point at 25 cm).
 
  What is the angular magnification of the microscope?
  A) 195 x B) 125 x C) 94 x D) 234 x E) 78 x


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Ptupou85

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

(a) 11.7 A (b) 10.3

Answer to Question 2

E


BRWH

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

juliaf

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Reply 3 on: Yesterday
Gracias!

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