body to form images. a) To see why an MRI utilizes iron to increase the magnetic field created by a coil, calculate the current needed in a 400-loop-per-meter circular coil 0.665 m in radius to create a 1.1 T field (typica an MRI instrument) at its center with no iron present. 1= ✔A Introducing ferromagnetic materials inside coils greatly increases the magntic field inside the coil a small amount of current. Think about the value of the current you got in part (a). Is that a practic value of current to use? (b) MRIs utilize the magnetic fields of protons. The magnetic field of a proton is approximately like that of a circular current loop 6.5-10-16 m in radius carrying 1.05 104 A. What is the field at the center of such a loop? B= T

body to form images. a) To see why an MRI utilizes iron to increase the magnetic field created by a coil, calculate the current needed in a 400-loop-per-meter circular coil 0.665 m in radius to create a 1.1 T field (typica an MRI instrument) at its center with no iron present. 1= ✔A Introducing ferromagnetic materials inside coils greatly increases the magntic field inside the coil a small amount of current. Think about the value of the current you got in part (a). Is that a practic value of current to use? (b) MRIs utilize the magnetic fields of protons. The magnetic field of a proton is approximately like that of a circular current loop 6.5-10-16 m in radius carrying 1.05 104 A. What is the field at the center of such a loop? B= T

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

See similar textbooks

Similar questions

A small circular coil of 20 loops of wire having a radius of 1 cm is at rest in the X-y plane (so the normal to the loop points in the +z-direction). A uniform magnetic field of 0.5 T is turned on in the +x-direction. What is the magnetic flux through the loop? a. 7.85 x 10 Tm² b. 1.57 x 10 4 T m² O c. 3.14 x 10 3 T m2 O d. 0 T m2
A half-meter conducting rod is under the influence of a 1000 G magnetic field that points perpendicularly to its length. How fast does the rod have to move to acquire a potential difference of 9V measured from its ends? a.) 180 m/s, assuming that the motion is perpendicular to the axis of the rod and perpendicular to the field b.) 180 m/s, assuming the the motion is parallel to the axis of the rod and perpendicular to the field c.) 180 m/s, assuming the the motion is perpendicular to the axis of the rod and parallel to the field d.) 180 m/s, assuming the the motion is parallel to the axis of the rod and parallel to the field e.) none of the above.
Figure 1 shows a square coil of side 4.5 cm. A battery is connected to the coil and produces a current of 6.8 A. The coil is placed in a uniform magnetic field of flux density 5.67 mT as shown in Figure 1. A C Figure 1 i) Calculate the size and direction of the electromagnetic force that will act on side AB. ii) Calculate the size and direction of the electromagnetic force that will act on side BC. iii) Describe the motion of the frame immediately after the current in the frame is switched on. North Pole South Pole
A velocity selector in a mass spectrometer, like the one shown below, uses a 0.133 T magnetic field.a. What electric field strength is needed to select a speed of 4.93*10^6 m/s?b. What is the voltage between the plates if they are separated by 1.00 cm?
1. A magnetic field has a magnitude of 1.50 × 10-³ T, and an electric field has a magnitude of 4.00 × 10³ N/C. Both fields -3 point in the same direction. A positive 2.5 µC charge moves at a speed of 2.50 × 106 m/s in a perpendicular to both fields. Determine the magnitude of the net force that acts on the charge. N ssfánection that is 0 ssf60 sf60 ss 50 ssf6 €60 ssf60 ss
(Hand by written ans.)A circular loop (10 turns) with a radius of 29 cm is in a magnetic field that oscillates uniformly between 0.95 T and 0.45 T with a period of 1.00 s. a. How much time is required for the field to change from 0.95 T to 0.45 T? b. What is the cross-sectional area of one turn of the loop? c. Assuming that the loop is perpendicular to the magnetic field, what is the induced emf in the loop? I have a test and i am revising and I got 2 answers for this question. could you please explain each step thoroughly for me to understand.
Determine the initial direction of the deflection of chargedparticles as they enter the magnetic fields, as shown in FigureP19.4.
= A single-turn circular loop has a radius of 25 cm, it is placed in a magnetic field of B 3.5 T which is perpendicular to the plane of the loop, see the figure below. The loop is reshaped into a perfect square without stretching the length of the loop. It takes 0.43 s to reshape the loop. What is the magnetic flux through the loop before and after it is reshaped? B X X X X X X X X X X X X X x x The final flux, Of = 5 x X X X X X X The initial flux, ¡ = 0.0000006 X Units mWb Х Х The induced emf, Emf = 34 X Units mWb x X X X What is the magnitude of the average induced emf in the loop during the reshaping process? X Units mV хх Question Help: Message instructor Post to forum
I need the answer as soon as possible
1. Loop moving into a Constant Magnetic Field. Consider a square loop with side length 1m moving at a rate 0.1 m/s in the +x-direction into a magnetic field 6m long with constant strength and direction of B = 1 T 2 (into the page). a. Sketch a diagram of the magnetic flux vs. time with t=0 when the right edge of the square loop just starts to enter the magnetic field. b. Sketch a diagram of the induced electromotive force.
A 2.0 µC positive charge of speed 6.0 × 106 m/s is moving in a 0.30 T magnetic field, the magnetic field and the charge's velocity are in the same direction as shown. What is the magnitude of the magnetic force on the charge, in Newtons? Your answer needs to have 2 significant figures, including the negative sign in your answer if needed. Do not include the positive sign if the answer is positive. No unit is needed in your answer, it is already given in the question statement. B +
3. Current head-on to point P: Consider the case where the current is heading straight toward the point where we want the magnetic field. What is the magnetic field at the point P shown? Hint: consider a small piece ds and think about what the Biot-Savart law tells you. Holds x f 4πr2 Think about the angle between ds and î. dB 7 D P