Physics Past Questions and Answers

The mode of heat transfer which does not require a material medium is

When two objects \(P\) and arc supplied with the same quantity of heat, the temperature change in \(P\) is observed to be twice that of \(Q\), the mass of \(P\) is half of \(Q\), the ratio of the specific heat of \(P\) to that of \(Q\) is

Which of the following conditions will make water boil at a temperature of 100 degrees Celsius when the atmospheric pressure is \(750 \mathrm{mmHg}\) ?

A solid weighs \(4.8 \mathrm{~g}\) in air, \(2.8 \mathrm{~g}\) in water and \(3.2 \mathrm{~g}\) in kerosene. The ratio of density of the solid to that of the kerosene is ____________

The extension in spring when \(5 \mathrm{~g}\) weight was hung from it was \(0,56 \mathrm{~cm}\). if Hooke's law is obeyed, what is the extension caused by a load of \(20 \mathrm{~g}\) weight?