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[" 15.A bob of a simple pendulum of mass...

[" 15.A bob of a simple pendulum of mass "40gm" with "],[" a positive charge "4times10^(-1)C" is oscillating with time "],[" period "T_(1)" : An electric field of intensity "3.6times10^(4)N/c],[" is applied vertically upwards now time period is "T_(2)" ."],[" The value of "(T_(2)^(@))/(T_(i))" is "quad (g=10m/s^(2))]

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