1
JEE Main 2023 (Online) 31st January Evening Shift
Numerical
+4
-1
A water heater of power $2000 \mathrm{~W}$ is used to heat water. The specific heat capacity of water is $4200 \mathrm{~J}$ $\mathrm{kg}^{-1} \mathrm{~K}^{-1}$. The efficiency of heater is $70 \%$. Time required to heat $2 \mathrm{~kg}$ of water from $10^{\circ} \mathrm{C}$ to $60^{\circ} \mathrm{C}$ is _________ s.
(Assume that the specific heat capacity of water remains constant over the temperature range of the water).
(Assume that the specific heat capacity of water remains constant over the temperature range of the water).
Your input ____
2
JEE Main 2023 (Online) 30th January Evening Shift
Numerical
+4
-1
A faulty thermometer reads $5^{\circ} \mathrm{C}$ in melting ice and $95^{\circ} \mathrm{C}$ in stream. The correct temperature on absolute scale will be __________ $\mathrm{K}$ when the faulty thermometer reads $41^{\circ} \mathrm{C}$.
Your input ____
3
JEE Main 2023 (Online) 29th January Morning Shift
Numerical
+4
-1
A body cools from 60$$^\circ$$C to 40$$^\circ$$C in 6 minutes. If, temperature of surroundings is 10$$^\circ$$C. Then, after the next 6 minutes, its temperature will be ____________$$^\circ$$C.
Your input ____
4
JEE Main 2023 (Online) 24th January Morning Shift
Numerical
+4
-1
A hole is drilled in a metal sheet. At $$\mathrm{27^\circ C}$$, the diameter of hole is 5 cm. When the sheet is heated to $$\mathrm{177^\circ C}$$, the change in the diameter of hole is $$\mathrm{d\times10^{-3}}$$ cm. The value of d will be __________ if coefficient of linear expansion of the metal is $$1.6\times10^{-5}/^\circ$$C.
Your input ____
Questions Asked from Heat and Thermodynamics (Numerical)
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