Indian Navy Pilot Equipotential Surfaces — practice questions

Explore 2 free Equipotential Surfaces questions in Indian Navy Pilot Physics. Open each question or exercise to read its content, reference answers and available explanation.

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Equipotential Surfaces questions and exercises with answers

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What is the electric field at the centre of a hollow conducting sphere of radius $R$ carrying total charge $Q$?Read the answer and worked solution →The principle that charge can be neither created nor destroyed is:Read the answer and worked solution →

Worked practice questions

What is the electric field at the centre of a hollow conducting sphere of radius $R$ carrying total charge $Q$?

$0$
$\dfrac{kQ}{R^2}$
$\dfrac{kQ}{R^3}$
$\dfrac{kQ}{R}$

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Correct answer: A. $0$

Inside any closed conducting shell with all charge residing on its outer surface, Gauss's law applied to a sphere of radius $r < R$ encloses zero charge so $E = 0$ everywhere inside the cavity.

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The principle that charge can be neither created nor destroyed is:

Conservation of energy
Conservation of charge
Conservation of momentum
Coulomb's law

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Correct answer: B. Conservation of charge

Total charge in an isolated system is conserved. Charge can be transferred between bodies but not created or destroyed. This is a fundamental conservation law in physics.