## Figure 7.21 shows a series LCR circuit connected to a variable frequency 230 V source. L = 5.0 H, C = 80μF , R = 40 Ω.

Figure 7.21 shows a series LCR circuit connected to a variable frequency 230 V source. L = 5.0 H, C = 80μF , R = 40 Ω.

## A radio can tune over the frequency range of a portion of MW broadcast band: (800 kHz to 1200 kHz). If its LC circuit has an effective inductance of 200 μH , what must be the range of its variable capacitor? [Hint: For tuning, the natural frequency i.e., the frequency of free oscillations of the LC circuit should be equal to the frequency of the radio wave.]

A radio can tune over the frequency range of a portion of MW broadcast band: (800 kHz to 1200 kHz). If its LC circuit has an effective inductance of 200 μH , what must be the range of its variable capacitor? [Hint: Read More …

## A series LCR circuit with R = 20 Ω, L = 1.5 H and C = 35 μF is connected to a variablefrequency 200 V ac supply. When the frequency of the supply equals the natural frequency of the circuit, what is the average power transferred to the circuit in one complete cycle?

A series LCR circuit with R = 20 Ω, L = 1.5 H and C = 35 μF is connected to a variablefrequency 200 V ac supply. When the frequency of the supply equals the natural frequency of the circuit, what is Read More …

## Suppose the initial charge on the capacitor in Exercise 7.7 is 6 mC.. What is the total energy stored in the circuit initially? What is the total energy at later time?

Suppose the initial charge on the capacitor in Exercise 7.7 is 6 mC.. What is the total energy  stored in the circuit initially? What is the total energy at later time?

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