Transfer of heat through objects touching source
Answer: Option (A) is the correct answer.
Explanation:
A diamagnetic material does not contain any unpaired electrons and therefore, in a magnetic field direction they will always flow in the direction opposite to the magnetic field.
Hence, a diamagnetic material will always repel the magnetic field whenever it comes in contact with that.
Thus, we can conclude that when the other end of the cylinder is brought near the North pole of the magnet then the other end of the cylinder will be repelled by the magnet.
Speed is distance divided by time (s = d/t)
We use the formula:
V= u + at
V- final velocity. U- intial velocity. A- acceleration. T- time
Note: velocity is speed in this question
Fill in values:
V= u + at
40= u + 4 x 5
40= u + 20
40 - 20 = u
u = 20m/s
The formula is M=Fd
so we have F=84N and d=0.25m
Now we just replace F and d into the formula M=84N×0.25m
And the last thing we do is calculate it
M=21Nm
