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Physics - Electrostatics Question with Solution | TestHub

PhysicsElectrostaticsPotential & potential energyEasy2 minPYQ_2020

PhysicsEasysingle choice

How much positive charge should be given to the earth so as to have the same potential as that of a positively charged sphere of $1 μC$ and radius $1 c m$ . (Radius of earth $= 6400 k m$ )

Options:

Answer:

Solution:

For potential of two spheres to be same,

$\frac{k q_{1}}{r_{1}} = \frac{k q_{2}}{r_{2}}$

or $\frac{q_{1}}{r_{1}} = \frac{q_{2}}{r_{2}}$

$\frac{q_{1}}{6400 \times 1 0^{3}} = \frac{1 \times 1 0^{- 6}}{1 0^{- 2}}$

$q_{1} = 640 C$

Stream:NTA_ABHYAS_NEETSubject:PhysicsTopic:ElectrostaticsSubtopic:Potential & potential energy

⏱ 2mℹ️ Source: PYQ_2020

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