Related Questions

In EM waves, polarization
A Is always vertical in an isotropic medium
B Is caused by reflection
C Is due to transverse nature of waves
D Results from longitudinal nature of waves
In solid insulator materials having only one kind of atom, the types of polarization which exist are
A Electronic only
B Electronic and ionic
C Electronic, ionic and permanent
D Electronic and permanent
A circular wheel 28 inches in diameter rotates the same number of inches per second as a circular wheel 35 inches in diameter. If the smaller wheel makes x revolutions per second, how many revolutions per minutes does the larger wheel make in terms of x?
A 12x
B 24x
C 36x
D 48x
A circular frame with a width of 2 inches surrounds a circular photo with a diameter of 8/ inches Assuring that the area of the frame does not overlap the area of the photo what is the area of the frame?
A 8 pie
B 20pie
C 25pie
D 11 pie
Two small circular parks of diameter 16 meter and 12 meter are to be replaced by a bigger circular park. What would be the radius of this new park, if the new park has to occupy the same space as the two small parks?
A 20 meter
B 15 meter
C 10 meter
D 100 meter
A circular wheel 28 inches in diameter rotates (moves) the same number of inches per second as a circular wheel 35 inches in diameter. If the smaller wheel makes x revolutions per second, how many revolutions per minute does the larger wheel make in terms of x?
A 12x
B 48x
C 24x
D 36x
The retardation of a flat faced follower when it has contact at the apex of the nose of a circular arc cam, is given by (where OQ = Distance between the centre of circular flank and centre of nose)
A $${\omega ^2} \times {\text{OQ}}$$
B $${\omega ^2} \times {\text{OQ}}\sin \theta $$
C $${\omega ^2} \times {\text{OQ}}\cos \theta $$
D $${\omega ^2} \times {\text{OQtan}}\theta $$
A semicircular disc rests on a horizontal surface with its top flat surface horizontal and circular portion touching down. The coefficient of friction between semi circular disc and horizontal surface is µ. This disc is to be pulled by a horizontal force applied at one edge and it always remains horizontal. When the disc is about to start moving, its top horizontal force will
A Remain horizontal
B Slant up towards direction of pull
C Slant down towards direction of pull
D None of the above
The velocity through a channel of circular section will be maximum when the depth of water is __________ the diameter of the circular channel.
A 0.34 times
B 0.67 times
C 0.81 times
D 0.95 times
The discharge through a channel of circular section will be maximum when the depth of water is __________ the diameter of the circular channel.
A 0.34 times
B 0.67 times
C 0.81 times
D 0.95 times

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