11.The resonant frequency of a series circuit consisting of an inductance 200 �H, a capacitance of 0.0005 �F and a resistance of 10? is:

12.The average value for half cycle in a 200 V AC source is:

13.An electric charge oscillating with a frequency of 1 kilo cycles/s can radiate electromagnetic waves of wavelength:

14.The frequency of voltage for an AC circuit if the equation of alternating voltage is V = 200 sin 314t, is:

15.In a step-up transformer the number of turns in: