Acapacitor has a potential difference of v applied across its plates. if the potential difference across its plates is increased to 2v, the energy stored in the capacitor is: a) reduced to half
b) doubles
c) reduced to one fourth
d) quadruples (four times bigger)
e) none of the above

During the experiment if you could triple the breakaway magnetic force with all other quantities left unchanged, what is the new value for the critical velocity if it was v0 (initial velocity), initially? (b) now if you halved the radius with all other quantities left unchanged, what is the new critical velocity if it was v0 (initial velocity), initially? (c) if during the experiment, critical velocity quadrupled with all other quantities left unchanged, what is the new breakaway force if its magnitude was initially f0,?