True or false?

A spherical capacitor. Inner shell, charge +0 Gaussian surface -Outer shell, charge -Q E E=0 9/ E-0 Figure 2: 2. Two concentric spherical conducting shells are separated by vacuum (Fig. 24.5). The inner shell has total charge +Q and outer radius ra and the outer shell has charge -Q and inner radius re. (a) The capacitance of this capacitor. Q Q ATEO 111 x 10-12 F/ m C =; (True, False) Va - Vo Q (b) The potential difference V = Va - Vb is: V = Va - Vo = ATED - - TO (True, False) (c) If (b) is true then Q = areolive -W and therefore Vr - V. = 1 1 - 4 - V - V = 1- (True, False) (d) The potential Va relative to infinity is Va - Vo = = ATEO L - = Va - Vb it follows that if the potential at infinity is set to zero then Vi = 0 and hence Va = V and therefore if (c) is true Vr = V+ 12-[# - )(True, False)