The capacitance of a charged capacitor is C and the energy stored in it is U. Write the expression for Q in terms of C and U. Share with your friends Share 1 Ved Prakash Lakhera answered this The expression for energy stored in a capacitor when its capacitance C and energy stored U is given, is U=12Q2CSo Q=2U×C 8 View Full Answer Siddharth Mehra answered this therefore U=q2/2C but q=VC SO U=CV2/2 1 Avinash Rath answered this Q=CV Also, VQ=U =>V=U/Q thus, Q=CV => Q=CU/Q => Q2 = CU => Q=sqrt(CU) i.e. Q equals the squared root of C*U :) 4