Last Updated On 01-06-2023 - By Jeesha Sara
A magnet of total magnetic moment 
A-
(cos
t) where b =1 Tesla and 
rad/s. The work done for reversing the direction o
|
(a) |
0.007 J |
(b) |
0.014 J |
|
(c) |
0.01 J |
(d) |
0.028 J |
f the magnetic moment at t = 1 second, is
Question ID - 50225 :- A magnet of total magnetic moment A- (cos t) where b =1 Tesla and rad/s. The work done for reversing the direction o
(a)
0.007 J
(b)
0.014 J
(c)
0.01 J
(d)
0.028 J
f the magnetic moment at t = 1 second, is
A magnet of total magnetic moment A- (cos t) where b =1 Tesla and rad/s. The work done for reversing the direction o
|
(a) |
0.007 J |
(b) |
0.014 J |
|
(c) |
0.01 J |
(d) |
0.028 J |
f the magnetic moment at t = 1 second, is
Work done, W= (
).
=2×
1 cos(0.125)
=0.02 J
correct answer is (b)
Next Question :
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To mop-clean a floor, a cleaning machine presses a circular mop of radius R vertically down with a total force F and rotates it with a constant angular speed about its axis. If the force F is disturbed uniformly over the mop and if coefficient of friction between the mop and the floor is |
|||
|
(a) |
|
(b) |
|
|
(c) |
|
(d) |
|
the torque applied by the machine on the mop is :
FR
FR/3
FR/2
FR/6View Topper Answer
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