Question 334: Electrostats & Capacitance

Question

The work done in placing a charge of $$8 	imes {10^{ - 18}}$$ coulomb on a condenser of capacity $$100$$ micro-farad is

Accepted Answer

The work done is stored as the potential energy. The potential energy stored in a capacitor is given by
$$U = {1 \over 2}{{{Q^2}} \over C}$$
$$ = {1 \over 2} 	imes {{{{\left( {8 	imes {{10}^{ - 18}}} ight)}^2}} \over {100 	imes {{10}^{ - 6}}}}$$
$$ = 32 	imes {10^{ - 32}}J$$

Answer

$$16 	imes {10^{ - 32}}\,\,joule$$

Answer

$$3.1 	imes {10^{ - 26}}\,\,joule$$

Answer

$$4 	imes {10^{ - 10}}\,\,joule$$

Answer

$$32 	imes {10^{ - 32}}\,\,joule$$

Electrostats & Capacitance

The work done in placing a charge of $8 \times {10^{ - 18}} coulomb on a condenser of capacity 100$ micro-farad is

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