A series LCR circuit has $\mathrm{L}=0.01\, \mathrm{H}, \mathrm{R}=10\, \Omega and \mathrm{C}=1 \mu \mathrm{F} and it is connected to ac voltage of amplitude \left(\mathrm{V}_{\mathrm{m}}\right) 50 \mathrm{~V}. At frequency 60 \%$ lower than resonant frequency, the amplitude of current will be approximately :