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Physics 2 paper of the University of Oxford

Past exam of the physics 2 paper of the University of Oxford

2014

Only the ideal <inductor> stores energy in this circuit; ideal <resistors> dissipate energy as heat. With $I_1(\infty)=V/(4R)$,
$$
\boxed{U_{\rm stored}=\frac12LI_1(\infty)^2=\frac{LV^2}{32R^2}.}
$$
The question excludes the battery's internal energy, and the continuously generated resistor heat is not stored electromagnetic energy.

Solution

Past exam of the physics 2 paper of the University of Oxford / 2014 / 9 / iv / Solution

Past exam of the physics 2 paper of the University of Oxford / 2014 / 9 / iv / Solution

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Past exam of the physics 2 paper of the University of Oxford / 2014 / 9 / iv / Solution

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