АНГЛ ИДЗ7

Answer the questions:

1. What is a necessary condition for resonance frequency?

2. Which reactance is directly proportional to frequency in graph?

3. In which point of graph capacitive and inductive reactance will be equal?

4. How capacitive reactance will change with increasing frequency during resonance?

5. Will the impedance be equal to zero, if capacitive and inductive reactance will be equal?

6. How can we transform frequency from hertz to radians?

7. Does resonance possible at different capacitive and inductive reactance?

Answers:

1. Resonance frequency can occur only under the condition that the capacitive reactance is equal to the inductive reactance.

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As inductive reactance, capacitance reactance

2. As seen on the graph, which is shown in the video, the inductive reactance ( is directly proportional to the frequency.

3. Сapacitive and inductive reactance will be equal at the point at which resonance occurs, at which frequency equal to the frequency of the resonance.

4. Based on the formula: with increasing frequency capacitive reactance will be decrease.

5. Impedance will not be zero, it will be equal to active resistance cause capacitive and inductive reactances will subtract each other.

,

As , because .

6. To convert frequencies from hertz to radians we need to use the formula

7. No, because a necessary condition for resonance is equality of the capacitive and the inductive resistances.