A heating element weighing 100 g made of a material with specific heat of 1 j/ (g °c) is exposed to ambient air at 30 c and attains a steady state temperature o

A heating element weighing 100 g made of a material with specific heat of 1 J/ (g °C) is exposed to ambient air at 30 C and attains a steady state temperature of 130 C while absorbing 100 W of electric power. Neglecting radiation, the time taken for the heating element to cool to 129° C after the power is switched off is most nearly equal to (a) 0.01 second (b) 0.1 second (c) 1.0 second (d) 10.0 second