NAT I Medical Physics MCQs With Answers

In a Millikan's oil drop experiment the charge on an oil drop is calculated to be 6.35 x 10-19 C. The number of excess electrons on the drop is

A piece of fuse wire melts when a current of 15 ampere flows through it.With this current, if it dissipates 22.5 W. the resistance of fuse wire will be

Quantity that remains unchanged in a transformer is

In which case application of angular velocity is useful?

Choose the correct statement

When a Na ion and a CI ion are placed in air a force F acts between them when they are separated by a distance of 1 cm from each other the permittivity of air and the dielectric constant of water are ε₀ and K respectively When a piece of salt is placed in water then the force between Na⁺ and CI^- ions separated by a distance of 1 cm will be

Band spectrum in produced by

For obtaining appreciable extension the wire should be

A particle moving in a magnetic field has increase in its velocity then its radius of the circle