To scan a patient, you need a magnetic filed of 0.4 Tesla. You have a solenoid of length 0.08 meters with 1500 turns. How much current must you flow through this solenoid to generate the necessary field 0.4 T? Remember: H Mo = 4 x 10-7. Give your answers in Amperes (A). m
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- A solenoid with 32 turns per centimeter carries a current I. An electron moves within the solenoid in a circle that has a radius of 1.7cm and is perpendicular to the axis of the solenoid. If the speed of the electron is 5.0×10^5 m/s, what is I?A magnetic core with an air gap has a permeability that can be considered infinite. It has a coil of wire wrapped around the core. The following is known about the core: A = 4(10-4) m² (Cross sectional area of the core) N = 500 (turn in the coil) 1g = 2 mm How much current is needed in the coil to create a force of 8 N closing the gap? O 0.714 A O 1.41 A O 0.509 A O 2.02 AA piece of copper wire has a resistance per unit length of 4.63 × 10/m. The wire is wound into a thin, flat coil of many turns that has a radius of 0.208 m. The ends of the wire are connected to a 12.0-V battery. Find the magnetic field strength at the center of the coil. Number i Units >
- The slide generator in the figure below is in a uniform magnetic field of magnitude 0.0500 T. The bar of length 0.340 m is pulled at a constant speed of 0.500 m/s. The U-shaped conductor and the bar have a resistivity of 2.75 ✕ 10−8 Ω · m and a cross-sectional area of 9.00 ✕ 10−4 m2. Find the current in the generator when x = 0.680 m. (Note that the A in the image below is the area of the loop, not the cross-sectional area of the conductor and bar.)An air-core solenoid with 66 turns is 8.00 cm long and has a diameter of 1.20 cm. When the solenoid carries a current of 0.790 A, how much energy is stored in its magnetic field? PA straight conductor of fixed length / is moving at 45 degrees to a uniform magnetic field of strength B with constant speed v. Calculate v, if B=9.7 T, 1=2.5 m and electromotive force e 5 V. Give your answer in Sl units. Answer: m/s
- Tutorial Exercise In an experiment designed to measure the Earth's magnetic field using the Hall effect, a copper bar 0.415 cm thick is positioned along an east-west direction. Assume n = 8.46 x 1028 electrons/m3 and the plane of the bar is rotated to be perpendicular to the direction of B. If a current of 8.00 A in the conductor results in a Hall voltage of 5.52 x 10-12 v, what is the magnitude of the Earth's magnetic field at this location?A toroid with N turns carries a current I. The toroid is made of a paramagnetic material with susceptibility χ. The magnetic field inside the toroid (a < r < b ) is? a. B=(1−χ)(μ0NI/4πr) b. B=(1+χ)(μ0NI/4πr) c. B=(1+χ)(μ0NI/2πr) d. B=(1−χ)(μ0NI/2πr)A conducting bar of length L = 0.40 m rotates in a counterclockwise direction with a constant angular speed of +2.0 rad/s about a pivot P at one end, as shown. A uniform magnetic field (magnitude = 7.5 T) is directed out of the paper. What is the potential difference, Vp- VA? AL B P. -L/2 -L/2- O a. 0.30 V O b. -0.30 V О с. - 1.20 V O d. 0.90 V О е. -0.90 V
- A magnetic field of 1.30 T is to be set up in an iron-core toroid. The toroid has a mean radius of 10.0 cm and magnetic permeability of 4900 Ho: What current is required if the winding has 440 turns of wire? The thickness of the iron ring is small compared to 10 cm, so the field in the material is nearly uniform. mAThe number of turns in a long solenoid whose length is 50 cm is 400. The area of cross-section of solenoid is 2.0 x 10-3 m^2. If the inside of a solenoid has a magnetic field of 5.0 x 10^-3 T, what is the magnetic flux inside the solenoid?A radioactive source emits beta particles (electrons– mass 9.11 × 10−31 kg) with energy 1 × 106 eV (1.6 × 10−13 J). The electrons enter a uniform magnetic field as shown. If the electrons emerge from the left side of the field at a right angle to their initial direction, what are the minimum strength and direction of the field?