In the circuit shown in fig. C is a parallel plate air capacitor having plate of area A =50 cm^2 each and distance d = 1 mm apart. R1, R2, and R3 are resistors having resistance 3Ω, 2Ω, and 1Ω respectively. Two identical sources each of emf V and of emf V and of negligible internal resistance are connected as shown in fig. if a dielectric strength of are is E0 = 3 × 106 V m^−10, calculate the maximum safe value of V.