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Modules 7.4

Impedance Quiz

Try our quiz, based on the information you can find in Module 7. Some questions will also require a knowledge of associated modules 5 and 6. Submit your answers and see how many you get right, but don't be disappointed if you get answers wrong. Just follow the hints to find the right answer and learn about Impedance as well as revising Reactance and AC Circuits as you go.

1.

Fig 7.4.1With reference to Fig 7.4.1, what is the reactance XL of inductor L?

2.

With reference to Fig 7.4.1, what is the Circuit Impedance Z?

3.

With reference to Fig 7.4.1, what is the Supply Current IS?

4.

With reference to Fig 7.4.1, what is the voltage (VR) across the resistor R?

5.

Fig 7.4.2With reference to Fig 7.4.2, Which of the formulae is correct for finding the value of Z in a LCR circuit?

6.

Fig 7.4.3With reference to Fig 7.4.3, What is the Reactance (XC) of capacitor C?

7.

With reference to Fig 7.4.3, what is the Impedance (Z) of the circuit?

8.

When connecting two amplifiers, x and y in cascade, overall gain is reduced because the output impedance of amplifier x, and the input impedance of amplifier y... (Complete the sentence)

9.

Fig 7.4.4Fig 7.4.4, shows a test set-up for measuring the ZIN of an audio amplifier. Which of the following should be initially connected at point X ?

10.

With reference to Fig 7.4.3, what is the Voltage (VC) across capacitor C?

 

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