A 12 pF capacitor is connected to a 50 V battery, the electrostatic energy stored in the capacitor i

Question

A 12 pF capacitor is connected to a 50 V battery, the electrostatic energy stored in the capacitor in nJ is

Professor PC Thomas Classes · Answer

(a) : Capacitance, $(C)=12 \mathrm{pF}=12 	imes 10^{-12} \mathrm{~F}$ Voltage of Battery, $(V)=50 \mathrm{~V}$ Energy stored in capacitor, \ $(U)=\frac{1}{2} C V^2$ $ U=\frac{1}{2} 	imes\left(12 	imes 10^{-12}ight)(50)^2=150 	imes 10^{-10} \mathrm{~J}=15 	imes 10^{-9} \mathrm{~J}=15 \mathrm{~nJ} $