Study your flashcards anywhere!

Download the official Cram app for free >

  • Shuffle
    Toggle On
    Toggle Off
  • Alphabetize
    Toggle On
    Toggle Off
  • Front First
    Toggle On
    Toggle Off
  • Both Sides
    Toggle On
    Toggle Off
  • Read
    Toggle On
    Toggle Off
Reading...
Front

How to study your flashcards.

Right/Left arrow keys: Navigate between flashcards.right arrow keyleft arrow key

Up/Down arrow keys: Flip the card between the front and back.down keyup key

H key: Show hint (3rd side).h key

A key: Read text to speech.a key

image

Play button

image

Play button

image

Progress

1/6

Click to flip

6 Cards in this Set

  • Front
  • Back
What is the formula to find inductive reactance?
2*PIE*F*L
What is the capacitive reactance of a 2uF capacitor at 400 Hertz?
199 ohms
You have a 4 ohm speaker and a 100 ohm source. What must the turns ratio be to match?
Zp/Zs = (Np/Ns)squared
5:1
A transformer has 400 turns on the primary and 1200 turns on the secondary. If 120 volts is applied to the primary What is the induced voltage on the secondary?
Es/Ep = Ns/Np
Es = 360 volts
A transformer has 500 turns on the primary and 100 turns on the secondary. If 120 volts AC is applied to the primary what is the voltage induced in the secondary?
Es/Ep = Ns/Np
Es = 24 volts
A transformer has a 10:1 turns ratio.If the primary has a current of 100mA, how much current flows in the secondary?
Ip/Is = Ns/Np
Is = 1A