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Physics - Electrostatics Question with Solution | TestHub

PhysicsElectrostaticsPotential & potential energyEasy2 minPYQ_2020

PhysicsEasysingle choice

The electric potential at point $A$ is $20 V$ and $B$ is $- 20 V$ .The work done by an external force in moving electron slowly from $B$ to $A$ is

Options:

Answer:

Solution:

$W = q (V_{f} - V_{i}) = - e (V_{A} - V_{B})$
$\Rightarrow W = - 1.6 \times 1 0^{- 19} (20 - (- 20))$
$\Rightarrow W = - 1.6 \times 1 0^{- 19} \times 40$
$\Rightarrow W = - 6.4 \times 1 0^{- 18} J$

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

⏱ 2mℹ️ Source: PYQ_2020

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