GATE Electrical Engineering (EE) 2016 Shift 1 Solved Paper

A dc voltage with ripple is given by V(t) = [100 + 10 sin (ωt) - 5 sin (3ωt)] volts. Measurements of this voltage v(t), made by moving-coil and moving-iron voltmeters, show, readings of V₁ and V₂ respectively. The value of  V₂ - V₁, in volts, is _________.