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Neurons in our bodies carry weak currents that produce detectable magnetic fields. A technique called magnetoencephalography, or MEG, is used to study electrical activity in the brain using this concept. This technique is capable of detecting magnetic fields as weak as 1.0 10-15 T. Model the neuron as a long wire carrying a current and find the current it must carry to produce a field of this magnitude at a distance of 4.8 cm from the neuron
You have a 1.8m long copper wire. You want to make an N-turn current loop that generates a 2.0mT magnetic field at the center when the current is 1.3A. What will be the diameter of your coil
How would you expect the circumference of a tree trunk to vary with height above the ground? How would the circumference of a tree branch vary as its distance from the trunk increased? Would the equations of engineering mechanics and strength of m..
question an object with a height of 10 cm is reflected from a mirror. the image reflected from the mirora is inverted
A 200 g calorimeter contain 500 g of water at 21 degree Celsius. A 100g of ice at -20 degree Celsius is placed into the calorimeter. find the specific heat of the material of the calorimeter
If both the ring and the rod are warmed together, what temperature must they both reach so that the ring barely slips over the rod.
A cell phone transmits at a frequency of 1.28 108 Hz. What is the wavelength of the electromagnetic wave used by this phone
Consider the scenario shown in the diagram below. A box (mass m1) is on a slope, which is inclined at an angle θ with respect to the horizontal. Find the expression for T.
A 12-turn generator coil with area 0.150m2 rotates in a 1.25T magnetic field. At what frequency should the coil rotate to produce a peak emf of 160
A copper wire has a diameter of 1.647 mm. What magnitude current flows when the drift velocity is 1.39 mm/s? Take the density of copper to be 8.92*103 kg/m3.
A 20 kg satellite has a circular orbit with a period of 2.8 h and a radius of 7.9 106 m around a planet of unknown mass. what is the radius of the planet
An electron with a speed of 4.00×10^6 m/s , collides with an atom. What is the speed of the electron after the collision
determine the length of the wire.
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