Transcranial magnetic stimulation (TMS) is a noninvasive technique used to stimulate regions of the human brain. A small coil is placed on the scalp, and a brief burst of current in the coil produces a rapidly changing magnetic field inside the brain. The induced emf can be sufficient to stimulate neuronal activity. One such device generates a magnetic field within the brain that rises from zero to 1.5 T in 120 ms. Determine the induced emf within a circle of tissue of radius 1.6 mm and that is perpendicular to the direction of the field.

Q: A generator has a square coil consisting of 640 turns. The coil rotates at 96 rad/s in a 0.350 T…

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Q: At a particular point on Earth, the magnitude of the Earth's magnetic field is 3.50 x 10-5 T. At…

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Q: A circular wire loop is placed in a uniform magnetic field region such that its plane is…

A: According to Faraday second law  Induced emf is directly proportional to rate of change of magnetic…

Q: Physics Magnet Question

A: Write the given values, and calculate the area of the rectangular loop.

Q: At a particular point on Earth, the magnitude of the Earth's magnetic field is 4.00 x 10-5 T. At…

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Q: A circular loop of wire with a radius of 4.0 cm is in a uniform magnetic field of magnitude 0.060 T.…

A: radius =  4.0 cm magnetic field initial = 0.060 T. time = 0.50s magnetic field initial = -0.040T

Q: Scientific work is currently underway to determine whether weak oscillating magnetic fields can…

A: Given:- Magnetic field B= 0.001 T frequency f= 54.5 Hz The diameter of the red blood cell is d=7.00…

Q: Problem 3: A rod AB with length L= 0.115 m is lying on a rectangular conducting loop of zero…

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Q: 14) A circular coil L moves with constant velocity v into a uniform magnetic field B as shown in the…

A: The direction of the current is determined by using Biot-Savart’s right-hand rule.

Q: A solenoid ring with N= 3 loops is immersed in a uniform time-varying magnetic field (shown in the…

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Q: During transcranial magnetic stimulation (TMS) treatment, a magnetic field typically of magnitude…

A: Initial magnetic field (B) = 0 Final magnetic field (B')  = 0.6 TTime taken (t) = 75 μsdiameter of…

Q: solenoid has the following dimensions. inner diameter d = 5.12 cm length L = 46.7 cm When a current…

A: Given : d = 5.12 cm = 0.0512 m L = 46.7 cm = 0.467 m B = 5.40 T

Q: In one of NASA's space tether experiments, a 20.0 km-long conducting wire was deployed by the space…

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Q: A copper wire with density ρ = 8960 kg/m3 is formed into a circular loop of radius 50.0 cm. The…

A: Given data, Density ρ=8960 kg/m3 r= 50 cm or 0.5 m A=1×10-5 m2 V=0.0120 V B=0.25 T ρR=16.78×10-9 Ω-m

Q: During transcranial magnetic stimulation (TMS) treatment, a magnetic field typically of magnitude…

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Q: A cyclotron designed to accelerate protons has a magnetic field of magnitude 0.320 T over a region…

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Q: When a car drives through the Earth's magnetic field, an emf is induced in its vertical 77.8 cm-long…

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Q: A metal bar of length 25 cm is placed perpendicular to a uniform magnetic field of strength 3 T. (a)…

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Q: During a transcranial magnetic stimulation (TMS) treatment, a magnetic field, typically of magnitude…

A: Given:-  The magnetic field B = 5 T  The current coil rises from Zero to peak in a time t = 65μs=…

Q: A cyclotron designed to accelerate protons has a magnetic field of magnitude 0.600 T over a region…

A: Just by using the formulas of cyclotron frequency and speed , you can find out the answers.

Q: A circular loop of wire of radius 0.25 m is exposed to an external magnetic field that is…

A: dB/dt = - 0.025 T/s  Radius of the loop is r = 0.25 m

Q: circular loop of copper wire has a radius of 12 cm and a resistance per unit length of 3.3 x 10-2…

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Q: A patient having an MRI scan has neglected to remove a copper bracelet. The bracelet is 6.0 cm in…

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Q: A circular conducting coil of radius 3.0 cm and 10 windings revolves at a frequency of 60…

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Q: t a particular place on the surface of the Earth, the Earth's magnetic field has magnitude of 4.50 ✕…

A: UE=0.5ε0E2=0.58.854×10-12 C/N·m2148 V/m2=9.70×10-8 J/m31 nJ10-9 J=97.0 nJ/m3

Q: 8. Assume that the resistance of the lightbulb is 6 Ω, the length of the bar is 1.2 m, and a uniform…

A: Given values: Resistance, R=6 Ω Length of the bar, l=1.2 m Magnetic field ,B=2.5 T Current, I=0.5 A…

Q: A magnetic field of magnitude 0.500 T is oriented perpendicular to the plane of a circular loop.…

A: Given  magnetic field (B)=0.500 T flux =2.55 Wb radius doubled. Required  radius flux

Q: A Hall-effect probe operates with a 120-mA current. When the probe is placed in a uniform magnetic…

A: Let I be the current, B1 is the magnetic field, VH1 is the hall voltage. The expression of the Hall…

Q: The flexible loop in Figure has a radius of 25.5 cm and is in a magnetic field of magnitude 0.150 T.…

A: r

Q: When a coil is placed in a magnetic field, the coil's normal to the plane stays parallel to the…

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Q: A Hall-effect probe operates with a 120 -mA current. When the probe is placed in a uniform magnetic…

A: Answer (a)  ∆VH = IB/ngt  ngt / I = B / ∆VH             = 0.09/(0.640×10-6v)           = 0.09×…

Q: At a particular point on Earth, the magnitude of the Earth's magnetic field is 2.50 ✕ 10−5 T. At…

A: Given that the magnetic field is 2.5 × 10-⁵ T. The area of the loop is 40 cm². We have to find the…

Q: A cyclotron designed to accelerate protons has a magnetic field of magnitude 0.330 T over a region…

A: We have protons accelerating in a cyclotron which has magnetic field B=0.330 T over a region of…

Q: An MRI technician moves his hand from a region of very low magnetic field strength into an MRI…

A: The induced emf can be given by ε=dϕdt=ddtBA=πr2dBdt

Q: In a region of space where the magnetic field of the earth has a magnitude of 80 mT and is directed…

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Q: A cyclotron designed to accelerate protons has a magnetic field of magnitude 0.650 T over a region…

A: Formula for cyclotron frequency and maximum speed Cyclotrons frequency of a proton can be obtained…

Q: n a physics laboratory experiment, a coil with 250 turns enclosing an area of 10.5 cm^3 is rotated…

A: Given data as per questionarea =  10-5cm2 B =  7*10-5T N  =  250 t  =  3.10*10-2

Q: 1.1- mm long rod rotates about an axis through one end and perpendicular to the rod, with an angular…

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Q: A solenoid ring with N = 3 loops is immersed in a uniform time-varying magnetic field (shown in the…

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Q: A solenoid of length 2.50 cm and radius 0.750 cm has 33 turns. If the wire of the solenoid has 1.25…

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Q: A loop of wire with radius r= 0.183 m is in a magnetic field of magnitude B as shown in the figure.…

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Q: A 35.6-meter-long spacecraft flies past a neutron star, and passes through the neutron star s…

A: Given data The spacecraft length is: L = 35.6 m The magnetic field strength is B = 7.95 x 104 T The…

Q: A loop of wire sits in an external magnetic field as shown (in other words, the field shown in the…

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Q: A solenoid ring with N = 3 loops is immersed in a uniform time-varying magnetic field (shown in the…

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Q: The circuit in the figure consists of switch S, a 4.60 V ideal battery, a 25.0 MN resistor, and an…

A: Given: Battery voltage, V = 4.6 resistor, R = 25 Mohm Radius of plates, = 5.3 cm distance between…

Q: conducting rod with length L = 24.5 cm is being pulled along a ong u-shape conductor with negligible…

A: Solution:- We know that the formula of induced emf along the rod

Q: An MRI technician moves his hand from a region of very low magnetic field strength into an MRI…

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Magnetic Field Of Coaxial Cable

The word coaxial means same axis. So for a long straight cable to be coaxial, it must have concentric cylindrical shaped conductor around it. Coaxial cable (popularly called ‘coax’) has various applications ranging from current conductors to radiofrequency signal transmitters. This cable has lower emission losses and provides protection from electromagnetic interference which allows signals with less power to transmit over longer distances.For example, currents produced in the pickup of a stereo turntable generally travel to the amplifier through a coaxial cable.The self-inductance of a coaxial cable is another important characteristic, because it influences the propagation of electrical signals in the cable.