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A horizontal bar of lenght L, mass M, and resistance R is free to slide without friction down along the vertical rails of a conducting frame of neglibigle resistance (see the figure below). A uniform margetic field B is present throughout the region of the frame, and is directed perpendicular to the frame, into the paper.
a. If the initial velocity of the moving bar is Vo, find the magnitude of the initial current flowing through the bar.
b. Which direction does the current flow though the bar? Explain your answer.
c. Eventually the magnetic force on the bar due to the induced current exactly balances the weight (Mg) of the bar, and the acceleration of the bar becomes zero. After that point, the bar continues to fall with a constant, terminal, velocity. Determine this terminal velocity.
What is the electric flux Φ through each of the six faces of the cube? What would be the flux Φ through a face of the cube ifits sides were of length L1?
The small spherical planet called "Glob" has a mass of 6.06×1018 kg and a radius of 5.84×104 m. What was the initial speed of the rock as it left the astronaut's hand? (Glob has no atmosphere, so no energy is lost to air friction
Roughly estimate how much faster you would tumble when compacted in a ball than you would when your body was extended and straight
If a 600 kg car is moving with a speed of 25 m/s, that what is its kinetic energy? State your answer in Joules. What is its momentum? What are the correct units of measurement for momentum?
A double prism is made by joining two thin glass prisms of different refractive index such as crown glass and flint glass, Determine the prism angle of the crown prism
Astronomers observe the chromosphere of the Sun with a filter that passes the red hydrogen spectral line of wavelength 656.3 nm. The filter consists of a transparent dielectric of thickness d held between two partially aluminized glass plates. The..
Why do magnetic field lines contract longitudinally and exert a lateral pressure?
A 40 kg block is at rest on a frictionless horizontal surface and is attached to one end of a horizontal spring, which has a spring constant of 500 N/m. Find the maximum elastic potential energy stored in the spring after the collision
A cylinder is fitted with a piston and is in thermal contact with a heat bath at 273 K. Initially the volume in the cylinder is filled with 10 kg of pure water and about half of this is liquid and other half is solid. The piston is lowered so as t..
Atwood's Machine The two masses (m1 = 5.1kg and m2 = 2.5kg ) in the Atwood's machine are released from rest, with m1 at a height of 0.95m above the floor. Determine the pulley's mass
A point charge of magnitude q is at the center of a cube with sides of length L. find the electric flux through each of the six faces of the cube
A bucket of water with a mass of 2kg is attached to a rope that is wound around a cylinder. The cylinder has a mass of 3 kg and is mounted horizontally on frictionless hearings. The bucket is released from rest.
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