If unpolarized light of intensity 1000 W passes through a polarizer and analyzer whose axes are placed at an angle of 300 to each other, what is the intensity of the emergent light?

Pick out the most correct matching for the following:

Identify the focal point of the objective in this diagram.( Left click on your selected point)

The vertical displacement of a string is given by y(x,t) = (6.00 mm) cos[(3.25 )x – (7.22 )t ]. What is the period of the wave?

A pipe that is 0.92 m long and open at both ends vibrates in the second overtone with a frequency of   What is the speed of sound in the air in this pipe?

A uniform magnetic field passes through a horizontal circular wire loop at an angle  16.2°  from the normal to the plane of the loop. The magnitude of the magnetic field is [B]  T , and the radius of the wire loop is [r]  m . Find the magnetic flux through the loop.

A 109  turn circular coil of radius  2.41  cm is immersed in a uniform magnetic field that is perpendicular to the plane of the coil. Over an interval of  0.159  s , the magnetic field strength increases from 58.3  mT to  98.3  mT . Find the magnitude of the average emf  induced in the coil during this time interval, in millivolts.

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The maximum torque on a current carrying loop occurs when the angle between the loop’s magnetic moment and the magnetic field vector is 

A thin copper rod 1.0 m long has a mass of 0.050 kg and is in a magnetic field of 0.10 T. What minimum current in the rod is needed in order for the magnetic force to balance the weight of the rod?