What is the difference between a series circuit and a parallel circuit?
1 answer:
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Answer:
(C) Only if it starts moving
Explanation:
We know that work done is given by
So there are two case in which work done is zero
First case is that when force and displacement are perpendicular to each other
And other case is that when there is no displacement
So for work to be done there must have displacement, if there is no displacement then there is no work done
So option (c) will be the correct option
Answer:
since the direction of force is along south so the magnetic field must be upwards
Explanation:
Force on moving charge in magnetic field is given as
here we know this is force on proton
so we have
also we know that the velocity of charge is
now from above formula we have
since the direction of force is along south so the magnetic field must be upwards