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Solve the following.
A student was given a frequency generator, a source, an inductor, a capacitor, a resistor and an…
A student was given a frequency generator, a source, an inductor, a capacitor, a resistor and an ammeter. After connecting the circuit correctly, the student tabulated the readings as shown below.
Plot the graph for the given data using proper axes.
| S.No. | Frequency (kHz) | Ammeter reading (mA) |
|---|---|---|
| 1 | 1.20 | 13.8 |
| 2 | 1.38 | 16.3 |
| 3 | 1.71 | 19.4 |
| 4 | 2.08 | 22.0 |
| 5 | 2.39 | 19.5 |
| 6 | 2.57 | 17.6 |
| 7 | 2.79 | 16.0 |
| 8 | 3.10 | 14.5 |
Answer
Answer
Official answer keyResonance curve: current I (y-axis) against frequency (x-axis); the curve rises to a peak of 22 A at $f = f_r = 2.08$ kHz (marked by dashed lines) and falls on either side.
From ISC 2025 Practice Physics, question 69(b).