A Parallel Plate Capacitor Is Constructed Using Two Square Metal

question 59

Multiple Choice

A parallel plate capacitor is constructed using two square metal sheets,each of side L = 10 cm.The plates are separated by a distance d = 2 mm and a voltage applied between the plates.The electric field strength within the plates is E = 4000 V/m.The energy stored in the capacitor is

• A)0.71 nJ
• B)1.42 nJ
• C)2.83 nJ
• D)3.67 nJ
• E)zero