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Author Question: Four unequal resistors are connected in series with each other. Which one of the following ... (Read 48 times)

fox

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Four unequal resistors are connected in series with each other. Which one of the following statements is correct about this combination?
 
  A) The equivalent resistance is equal to that of any one of the resistors.
  B) The equivalent resistance is equal to average of the four resistances.
  C) The equivalent resistance is less than that of the smallest resistor.
  D) The equivalent resistance is less than that of the largest resistor.
  E) The equivalent resistance is more than the largest resistance.

Question 2

In grinding a steel knife, the metal can get as hot as 400C.
 
  If the blade has a mass of 80 g, what is the minimum amount of water needed at 20C if the water is to remain liquid and not rise above 100C when the hot blade is quenched in it? The specific heat of the steel is 0.11 cal/g  C and the specific heat of water is 1.0 cal/g  C. A) 22 g
  B) 33 g
  C) 44 g
  D) 55 g


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Tonny

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fox

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Reply 2 on: Jul 29, 2018
Excellent


juliaf

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Reply 3 on: Yesterday
:D TYSM

 

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