#4. When the LRC circuit in this experiment is driven at its resonance frequency

Question

#4. When the LRC circuit in this experiment is driven at its resonance frequency, the voltage across the resistor will be:

(a) at zero voltage,

(b) at a minimum and equal to the driving voltage,

(c) at a maximum and equal to the driving voltage,

(d) at a maximum and Q times the driving voltage

#5. When a series LRC circuit is driven at its resonance frequency, the phase difference between the drive voltage and the voltage across the resistor will be

(a) 180o out of phase,

(b) 90o out of phase,

(c) 0o or in-phase.

#6. In Part C of this experiment, an iron rod is placed in the core of the inductor. Should the resonance frequency of the LRC circuit

(a) increase,

(b) decrease,

(c) not change, or

(d) there is no way to determine the answer from the information given.

#7. In Part C of this experiment, an aluminum rod is placed in the core of the inductor. Should the resonance frequency of the LRC circuit

(a) increase,

(b) decrease,

(c) not change, or

(d) there is no way to determine the answer from the information given.

Explanation / Answer

4. (C) max and equal to driving voltage.

5. (C) in phase

6. (B) frequency decreases

7.(d) there is no way to determine the answer from information given

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