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Examples of Inductors

Examples of Inductors. What are Inductors Good For?. Storing, releasing energy (like capacitor) Timing circuits (with resistor) Oscillator (with capacitor) Resonant tuning (with capacitor and resistor). Other Circuit Elements. Transistors. Diode. Which current is changing more rapidly?

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Examples of Inductors

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  1. Examples of Inductors

  2. What are Inductors Good For? • Storing, releasing energy (like capacitor) • Timing circuits (with resistor) • Oscillator (with capacitor) • Resonant tuning (with capacitor and resistor)

  3. Other Circuit Elements Transistors Diode

  4. Which current is changing more rapidly? • Current I1. • Current I2. • They are changing at the same rate. • Not enough information to tell.

  5. Clicker Question

  6. What is the battery current immediately after the switch has closed? • 0 A • 1 A • 2 A • Undefined

  7. What is the battery current immediately after the switch has been closed for a very long time? • 0 A • 1 A • 2 A • Undefined

  8. Back EMF (MIT Demo) https://www.youtube.com/watch?v=aSmMFog10D0

  9. Make-Before-Break Switch for Inductors More familiar switch is “break-before-make”

  10. If the top circuit has an oscillation frequency of 1000 Hz, the frequency of the bottom circuit is • 500 Hz. • 707 Hz. • 1000 Hz. • 1410 Hz. • 2000 Hz.

  11. In the circuit represented by these graphs, the current ____ the voltage • leads • lags • is less than • is out of phase with

  12. QuickCheck 35.4 If the value of the capacitance is doubled, the capacitive reactance • Is quartered. • Is halved. • Is doubled. • Is quadrupled. • Can’t tell without knowing . Slide 35-40

  13. QuickCheck 35.5 If the value of the capacitance is doubled, the peak current • Is quartered. • Is halved. • Is doubled. • Is quadrupled. • Can’t tell without knowing C. Slide 35-42

  14. QuickCheck 35.6 Does VR + VC = 0? • Yes. • No. • Can’t tell without knowing . Slide 35-54

  15. QuickCheck 35.7 If the value of R is increased, the resonance frequency of this circuit • Increases. • Decreases. • Stays the same. Slide 35-75

  16. QuickCheck 35.8 The resonance frequency of this circuit is 1000 Hz. To change the resonance frequency to 2000 Hz, replace the capacitor with one having capacitance • C/4. • C/2. • 2C. • 4C. • It’s impossible to change the resonance frequency by changing only the capacitor. Slide 35-77

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