alleryA 100W heater warms a body of C=200J/K by10K. No loss or phase change. Time?
A200s
B2s
C20s
D10s
Answer & Solution
Correct answer: C. 20s
The body requires 200×10=2,000J, which a 100W heater supplies in 20s.
Keep practising Heat: calorimetry, specific heat capacity and latent heat
Browse all Heat: calorimetry, specific heat capacity and latent heat questions for ICSE Class 10, or explore more Physics topics.
Related questions
Match each everyday calorimetric effect with its physics explanation:Match each thermal mixing concept with its rule:Match each substance with its notable calorimetric property:Match each thermal capacity term with its definition and formula:Same power, no loss: ice0°C melts in8t; equal water mass warms10K in t. Lf/cwater?Equal water masses80°C,20°C mix in a cup20°C of the same heat capacity as one mass. No losWater0°C freezes to warm20g ice−10→0°C. cice=2.1J/(gK), Lf=336J/g. No other heat. Mass fro50g ice0°C receives4.2kJ from cooling water. Lf=336J/g. No other heat. Ice remaining?