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Physics - Electrostatics Question with Solution | TestHub

PhysicsElectrostaticsMiscellaneousEasy2 minPYQ_2020

PhysicsEasysingle choice

Two identical capacitors each of capacitance 5 $μ$ F are charged to potentials 2kV and 1kV respectively. Their -ve ends are connected together. When the +ve ends are also connected together, the loss of energy of the system is

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Answer:

Solution:

Loss of energy $= \frac{1}{2} \frac{C_{1} C_{2}}{(C_{1} + C_{2})} {(V_{1} - V_{2})}^{2}$

$= \frac{1}{2} \frac{5 \times 10^{- 6} \times 5 \times 10^{- 6} {(2000 - 1000)}^{2}}{(5 + 5) \times 10^{- 6}}$

$= \frac{5 \times 5}{2 \times 10} = 1.25 J$

Stream:NTA_ABHYAS_NEETSubject:PhysicsTopic:ElectrostaticsSubtopic:Miscellaneous

⏱ 2mℹ️ Source: PYQ_2020

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