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Explore Class 11 Physics past and model questions by chapter, year, marks and question type.
26 questions found
A student needed to use the ideal gas for a certain experiment. But, the ideal gas does not exist. Suggest what two different things this student could do to solve his problem.
Define temperature gradient in an object.
An electric kitchen range has a total wall area of $1.40 \text{ m}^2$ and is insulated with a layer of fiber glass that has a temperature of $175^\circ \text{C}$ and its outside surface is $35^\circ \text{C}$. The fiber glass has a thermal conductivity of $0.040 \text{ W m}^{-1} \text{K}^{-1}$. Calculate the rate of flow of heat through the insulation, assuming the fibre as a flat slab of area $1.40 \text{ m}^2$.
How might the rate of conduction be affected if the fiber absorbs moisture? Justify your answer.
After landing the aeroplane’s momentum becomes zero. Explain how the law of conservation holds here.
A metre rule is used to measure the length of a piece of string in a certain experiment. It is found to be $20 \text{ cm}$ long to the nearest millimeter. How should this result be recorded in a table of results?
$0.2000 \text{ m}$
$0.200 \text{ m}$
$0.20 \text{ m}$
$0.2 \text{ m}$