Question: 100% NCERT covered from Particular Keyword.Explanations are 100% from NCERT | [Difficult level: Easy] From NCERT NEET Derived Question.
An electron and a proton are moving under the influence
of mutual forces. In calculating the change in the kinetic
energy of the system during motion, one ignores the
magnetic force of one on another. This is because,
(a) the two magnetic forces are equal and opposite, so
they produce no net effect.
(b) the magnetic forces do no work on each particle.
(c) the magnetic forces do equal and opposite (but nonzero)
work on each particle.
(d) the magnetic forces are necessarily negligible.
Answer:b
