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Author Question: A transformer with 120. turns in its secondary supplies 12. volts at 220. ma to a toy train. The ... (Read 106 times)

Starlight

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on: Jul 29, 2018
A transformer with 120. turns in its secondary supplies 12. volts at 220. ma to a toy train. The primary is connected across a 120. V wall outlet.
 
  (a) How many turns are in the primary?
  (b) What is the primary current?
  (c) What power is delivered by the wall outlet?

Question 2

An asteroid approaches Earth so that when it is very far away it is traveling with a speed of 6500 m/s along a line that would miss the center of Earth by 8,500,000 m.
 
  Because of the gravitational attraction of Earth, it departs from this straight line and curves towards Earth, colliding with it. In what direction, below the local horizontal, is the asteroid traveling when it hits Earth? The mass of Earth is 5.97  1024 kg and G = 6.67 x 10-11 Nm2/kg2. A) 48
  B) 58
  C) 68
  D) 78
  E) 88


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peilian

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

(a) 1.2  103
(b) 22.0 mA
(c) 2.64 watts

Answer to Question 2

A


Starlight

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Reply 2 on: Jul 29, 2018
:D TYSM

at

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Reply 3 on: Yesterday
Excellent

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