Physics Past Questions and Answers

In a uniform electric field, the magnitude of the force on a charge of 0.2 C is 4N. Calculate the electric field intensity

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?