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Physics - Electrostatics Question with Solution | TestHub

PhysicsElectrostaticsMiscellaneousEasy2 minPYQ_2020

PhysicsEasysingle choice

A fully charged capacitor has a capacitance $C$ . It is discharged through a small coil of resistance wire embedded in a thermally insulated block of specific heat capacity $s$ and mass $m$ . If the temperature of the block is raised by $∆ T$ , the potential difference $V$ across the capacitance is

Options:

Answer:

Solution:

$E = (\frac{1}{2}) C V^{2}$ ...(i)

The energy stored in capacitor is lost in form of heat energy

$H = m s ∆ T$ ...(ii)

From Eqs. (i) and (ii), we have

$m s ∆ T = (\frac{1}{2}) C V^{2}$

$V = \sqrt{\frac{2 m s ∆ T}{C}}$

Stream:NTA_ABHYAS_NEETSubject:PhysicsTopic:ElectrostaticsSubtopic:Miscellaneous

⏱ 2mℹ️ Source: PYQ_2020

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