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Solenoids produce magnetic fields that are relativelyintense for the amount of current they carry. To make a directcomparison, consider a solenoid with 57 turns per centimeter, aradius of 1.05 cm, and a current of 0.144 A. Calculate the magnetic field at the center of the solenoid.
What current must a long, straight wire carry tohave the same magnetic field as that found above? Let the distancefrom the wire be the same as the radius of the solenoid, 1.05cm.
The lens of a slide projector with a focal length of a 120 mm projects a slide onto a screen that is 13 m away. How far from the lens must the slide be placed to form a sharp image on the screen? (in cm)
two small objects a and b are fixed in place and separated by 2.62 cm in a vacuum. object a has a charge of 1.29 micro
A little cat, Bella, walks in a straight line, which we shall call the x axis, with positive direction to the right. As an observant scientist, you make measurements of her motion and construct a graph of the little feline's velocity as a function..
Two compact sources of sound oscillate in phase with a frequency of 90 Hz where the speed of sound is 340 m/s. What is the amplitude of the resultant wave at that point
A wire cable is rated to have a maximum power of 308 W. If the potential difference is 110 V, what maximum current can the wire handle
A 45.0 kg girl is standing on a 150 kg plank. The plank,originally at rest, is free to slide on a frozen lake, which is aflat, frictionless surface. What is her velocity relative to the surface of the ice
two horizontal forces and are acting on a box but only is shown in the drawing. can point either to the right or to
You are given a slide with two slits cut into it and asked how far apart the slits are. What is the separation of the two slits
A hoop and a disk, both of 0.68- m radius and 4.0- kg mass, are released from the top of an inclined plane 2.6 m high and 7.7 m long. What is the speed of the disk
In a single slit diffraction experiment, the width of the slit is 3.1×10-5 m and the distance from the slit to the screen is 2.2 m. what is the linear distance on the screen from the center of the diffraction pattern to the first dark fringe
The electron beam Cathodes and anodes An electron gun usually consists of a cathode and an anode. The cathode is a filament that is connected to a potential difference (filament voltage), and the resulting current heats the filament to incandescen..
A 450 loop circular armature coil with a diameter of8.0cm rotates at 120 rev/s in a uniform magnetic field of strength 0.55 T. What is the rms voltage output of the generator
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