Physics Past Questions and Answers

Which of the following pairs of musical instruments produce sound due to the vibration of air column?

Calculate the heat energy lost when 10g of boiling water changes to ice at 0°C. [Specific latent heat of ice 336Jg^-1 . Specific heat capacity of water 4.2Jg^-1 K^-1]

An effort P applied at one end of a crowbar just overcomes the resistance W at the lid of a tin. The mechanical advantage of the crowbar is expressed as ____________

The phenomenon of photoelectric effect is used in the following EXCEPT

Calculate the work done in charging a capacitor of capacitance 20µF through a potential difference of 1000V.