In an MRI machine, a large magnetic field is generated by the cylindrical solenoid surrounding the patient. If the current is 4 kA, the magnet depth is 3m and superconducting wire is 1cm wide, what is the magnetic field that the patient experiences?
In an MRI machine, a large magnetic field is generated by the cylindrical solenoid surrounding the...
An MRI (magnetic resonance imaging) solenoid produces a magnetic field of 1.7 T . The solenoid is 2.5m long, 1.0 m in diameter, and wound with insulated wires 2.0 mm in diameter.Find the current that flows in the solenoid. (Your answer should be rather large. A typical MRI solenoid uses niobium-titanium wire kept at liquid helium temperatures, where it is superconducting.)
An MRI (magnetic resonance imaging) solenoid produces a magnetic field of 1.7 T . The solenoid is 2.5m long, 1.0 m in diameter, and wound with insulated wires 2.4 mm in diameter.Find the current that flows in the solenoid. (Your answer should be rather large. A typical MRI solenoid uses niobium-titanium wire kept at liquid helium temperatures, where it is superconducting.)
The main magnet in an MRI machine is a superconducting solenoid 2.0 m long and 33 cm in radius. During normal operation, the current through the windings is 81 A, and the resistance of the windings is zero. The inductance of the solenoid is 89 H. (a) Calculate the turns per meter of the solenoid. (b) Calculate the magnitude of the magnetic field generated by the MRI machine during normal operations. (c) Calculate the magnetic flux through a single turn...
Magnetic Resonance Imaging An MRI (magnetic resonance imaging) solenoid produces a magnetic field of 1.4 T . The solenoid is 2.5m long, 1.0 m in diameter, and wound with insulated wires 2.2 mm in diameter. Find the current that flows in the solenoid. (Your answer should be rather large. A typical MRI solenoid uses niobium-titanium wire kept at liquid helium temperatures, where it is superconducting.)
6. An solenoid in an MRI machine produces an axial magnetic field of 3.5 T. If the length of the MRI is 1.4 m and it is wound with 800 turns of wire, what current is needed to produce this field?
The main magnet in an MRI machine is a superconducting solenoid 1.3 m long and 45 cm in radius. During normal operation, the current through the windings is 108 A and the magnetic field strength is 1.4 T. Round your answers to the nearest whole number. (a) How many turns does the solenoid have? Your answer: turns (b) How much energy is stored in the magnetic field during normal operation? Your answer: (c) How much energy is stored if the...
An MRI uses a large magnetic field (as well as radio waves) to create images of a person's body. One such MRI designed for full-body scans includes a large solenoid with 1×105 turns that is 0.95 m long. The solenoid is meant to draw a current of 9 A , and when it starts, it takes 5 seconds for the solenoid to reach that current from zero. Part A: A patient inside the MRI is wearing a gold ring...
A very large, superconducting solenoid such as one used in MRI scans, stores 1.00 MJ of energy in its magnetic field when 120 A flows. (a) Find its self-inductance (in H) (b) If the coils "go normal," they gain resistance and start to dissipate thermal energy. What temperature (in °C) increase is produced if all the stored energy goes into heating the 1080 kg magnet, given its average specific heat is 200 J/kg.°C? OC
16. To generate a uniform 2T magnetic field for an MRI machine with a coil of diameter 50 cm and 10 000 turns over the 1 m distance of the coil, (a) Solve for the current through the coil needed to create this large magnetic field. 2 (b) Approximate the total length of wire needed to produce 10 000 turns of this radius. /2 (c) If we need to keep the resistive power emitted by this coil under 1000 W...
Using an MRI system involves placing a person in a large superconducting solenoid that can create a magnetic field as large as 3 T. When the imaging process is done, simply switching off the field could induce very large currents in the patient. Estimate the minimum time that we need to ramp down a 3 T field to zero to keep the induced current flowing around a persons torso below 1 mA. Hint: argue that the loop that matters here...