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Physics - Capacitor Question with Solution | TestHub

PhysicsCapacitorForce & Energy analysisHard2 minPYQ_2009

PhysicsHardsingle choice

If the charge on a capacitor is increased by 2 coulomb, the energy stored in it increases by $21%$ . The original charge on the capacitor is

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Answer:

Solution:

$\frac{\frac{q _{f}^{2}}{2 C} - \frac{q _{i}^{2}}{2 C}}{\frac{q _{i}^{2}}{2 C}} \times 100 = 21$ and $q_{f} - q_{i} = 2$ solving we get $q_{i} = 20$ coulomb

Stream:WBJEESubject:PhysicsTopic:CapacitorSubtopic:Force & Energy analysis

⏱ 2mℹ️ Source: PYQ_2009

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