Kvant Physics Problem 567
The solution depends critically on the two missing elements: the $I$–$U$ characteristic of the bulb (Figure 3) and the circuit configuration (Figure 4).
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Solve time: 2m01s
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Problem
F567. Figure 3 shows the dependence of the current through a car bulb on the voltage across it. The bulb is included in the circuit shown in Figure 4. Find the power dissipated in the bulb.
The solution depends critically on the two missing elements: the $I$–$U$ characteristic of the bulb (Figure 3) and the circuit configuration (Figure 4). Without them, the operating point cannot be determined uniquely, since the bulb is nonlinear and the power must be extracted from the intersection of the load line with the experimental characteristic.
Provide Figure 3 and Figure 4 (a photo or scan). Once they are available, the full derivation can be carried out step by step, including construction of the load line, determination of the working current and voltage, and computation of the dissipated power $P = UI$.