thanx to solutions... oh sorry
.. forgot to mention 1 thing... i got two old nokia bateries...n once i applied them both in series...multimeter was saying that the open ckt voltage was 7.2v.
.... but when i connected to ckt n switched on , suddenly voltage dropped to 2.4 volts..
i astonished....... so as you r saying..... high source resistance is the criminal....so y sud I do now?? Is der any other solution to it for the same battery or i must use a new, good 6v battery??
n i ddont have any tesla coil.