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Physics - Capacitor Question with Solution | TestHub

PhysicsCapacitorForce & Energy analysisEasy2 minPYQ_2021

PhysicsEasysingle choice

If the potential difference across a capacitor is increased from $5 V$ to $15 V$ , then the ratio of final energy to initial energy stored in the capacitor is

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Answer:

Solution:

Initial energy $W_{1} = \frac{1}{2} CV_{1}^{2}$ Final energy $W_{2} = \frac{1}{2} CV_{2}^{2}$ $∴ \frac{W _{2}}{W _{1}} = (\frac{V _{2}}{V _{1}})^{2} = (\frac{15}{5})^{2} = (3)^{2} = 9$

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

⏱ 2mℹ️ Source: PYQ_2021

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