The work done is B.
Explanation:
The work done by a force on an object is given by
where
F is the magnitude of the force
d is the displacement of the object
is the angle between the direction of the force and of the displacement
For the boat in this problem, we have:
F = 250 N (force applied)
d = 50 m (displacement)
Substituting, we find the work done:
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Force on a proton when they are moving inside the magnetic field is given by
so here while protons are going upwards we can say its direction of velocity is towards +Y and magnetic field is towards us which is along +Z direction so they will have force due to this motion.
As per above equation of force we can have direction of force which is along +X direction.
So here both proton will bend towards +X direction and start moving in curved path.
Answer:
Explanation:
The wires are in circular shape . They have common center .
magnetic field due to circular wire is given by the formula
B =
where I is current , r is radius of the coil .
magnetic field due to inner wire
=
magnetic field due to outer wire
=
These should be equal and opposite so that by cancelling each other , they create zero field.
=
I = 16.66 A
Direction of current should be in opposite direction ie anticlockwise when looking from above.
Here in all such collision type question we can use momentum conservation as we can see that there is no external force on this system
as we know that
now from above equation we have
so the speed of combined system is 2 m/s