Physics Past Questions and Answers

A 10- Ω coil takes 21 s to melt 10g of ice at 0^oC. Assuming no heat losses, determine the current in the coil. (Specific latent heat of fusion of ice = 336 Jg^-1)

A point charge of magnitude 2μC is moved through a distance of 0.02 m against uniform field of intensity 25 Vm^-1 Calculate the work done on the charge

Bohr’s atomic model proves most successful for the explanation of the. I. structure of the hydrogen atom; II. line spectra of the hydrogen atom; III. Multi-electron atoms. Which of the statements above is/are correct?

The diagram above illustrates the energy transitions of five electrons of an atom. Which of the transitions will produce the emission of longest wavelength?

Which of the transitions will produce the emission of highest frequency?