Lab4_activity

I Review Laboratory scientists have created the electric and magnetic fields shown in (Figure 1). These fields are also seen by scientists that zoom past in a rocket traveling in the x-direction at 1.0 x 106 m/s. Assume that B = 0.52 T and E = 1.2x106 V/m. Part A According to the rocket scientists, what angle does the electric field make with the axis of the rocket? Express your answer in degrees. ? ° above the axis of the rocket Figure 1 of 1> Submit Request Answer 1.0 X 10 m/s Provide Feedback Next > 458

part B

Subject: physics

I Review | Constants Part A A beam of protons traveling at 1.40 km/s enters a uniform magnetic field, traveling perpendicular to the field. The beam exits the magnetic field, leaving the field in a direction perpendicular to its original direction (the figure (Figure 1)). The beam travels a distance of What is the magnitude of the magnetic field? Express your answer in teslas. 1.10 cm while in the field. ΑΣΦ xa X•10" Figure 1 of 1 B = T Submit Previous Answers Request Answer X Incorrect; Try Again; 8 attempts remaining Provide Feedback Next > В X X X X Pearson 圓 因 t

Problem 1 A mass spectrometer is below. E = 1,000 V/m between the parallel plates and B = 0.5 T throughout the entire apparatus. A singly charged ion of mass = 4.0 X 10-26 kg flies straight through the velocity selector and into the magnetic chamber. Photographic plate Bin E Velocity selector Во, in O 2003 Thomson - Brooks Cole a) Is the ion positively or negatively charged? How does the experiment justify your answer? b) Calculate the speed of the ion as it exits the velocity selector. c) Calculate the radius of the path that the ion follows in the B field. d) What is the speed of the ion as it strikes point P? Justify your answer in terms of the work done by the magnetic field. X x X X x x X

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Part A Suppose the initial speed of the proton in the figure( Figure 1) is decreased. Does the time spent in each of the field regions increase, decrease, or stay the same? Figure 1 of 1 B₂ B₁ B3 increases decreases stays the same Submit Request Answer Part B Choose the best explanation from among the following: With a smaller speed the proton is forced out of each magnetic region more quickly, which results in a decrease in the time. The time for an orbit in a magnetic field is independent of speed. Therefore, the time the proton spends in each of magnetic regions is the same no matter what its speed. The proton moves more slowly, and therefore the time spent moving through each of magnetic regions will increase. Submit Request Answer Provide Feedback Next >

I Review | Constants Part A A thin, 45.0 cm long metal bar with mass 800 g rests on, but is not attached to, two metallic supports in a uniform magnetic field with a magnitude of 0.500 T, as shown in (Figure 1). A battery and a resistor of resistance 22.0 2 are connected in series to the supports. What is the largest voltage the battery can have without breaking the circuit at the supports? Express your answer in volts. For related problem-solving tips and strategies, you may want to view a Video Tutor Solution of Magnetic force on a straight conductor. ? V = V Submit Request Answer Part B The battery voltage has the maximum value calculated in part (a). If the resistor suddenly gets partially short-circuited, decreasing its resistance to 2.00 N, find the initial acceleration of the bar. Figure Express your answer in meters per second squared. ? V R a = m/s? Submit Request Answer B X X X X X Provide Feedback Next >

Question 2

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A scientist measuring the resistivity of a new metal alloy left her ammeter in another lab, but she does have a magnetic field probe. So she creates a 7.5-m-long, 2.0-mm-diameter wire of the material, connects it to a 1.5 V battery, and measures a 4.5 mT magnetic field 1.0 mm from the surface of the wire. Part A What is the material's resistivity? Express your answer in ohm-meters with the appropriate units. ► View Available Hint(s) p= IVE| ΑΣΦ xa Xb √x x x x IXI ? X.10n 1► Ω·m

Problem # 2 A circuit has a circular parallel plate capacitor of radius R = 5 cm. During the charging process and at a distance r=R/2, the magnetic field was B = 5.00 μT I. What will be the rate of change in time of the electric field (unit is v/m-sec)? II. What will be the magnetic field in between the two plates at r= R?

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A new cordless phone emits 3.6 mW at 5.8 GHz. The manufacturer claims that the phone has a range of 100 feet. Part A If we assume that the wave spreads out evenly with no obstructions, what is the electric field strength at the base unit 100 feet from the phone? Express your answer to two significant figures and include the appropriate units. HẢ E0 = Value Units Submit Request Answer Provide Feedback

Problem 27.44 Part A What is the value of q/m for a particle that moves in a circle of radius 8.0 mm in a 0.59 T magnetic field if a crossed 210 V/m electric field will make the path straight? Express your answer using two significant figures. ΨΓ ΑΣΦ + q/m = Submit Provide Feedback Request Answer C ? C/kg

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An electron moves at 2.70 × 106 m/s through a region in which there is a magnetic field of unspecified direction and magnitude 7.00 × 10-² T. Part A What is the largest possible magnitude of the acceleration of the electron due to the magnetic field? Express your answer with the appropriate units. a = 0 xa Submit HÅ Xb Value 016 X.10n Units X Previous Answers Request Answer ?

Constants An electron at point A in the figure (Figure 1) has a speed vn of 1.50x10° m/s. Part A Find the magnitude of the magnetic field that will cause the electron to follow the semicircular path from A to B. Express your answer in teslas. ]να ΑΣφ B = T Submit Request Answer Figure < 1 of 1 • Part B vo Part C Find the time required for the electron to move from A to B. Express your answer in seconds. В -10.0 cm t =

When a car drives through the Earth's magnetic field, an emf is induced in its vertical 50-cm-long radio antenna. Submit Previous Answers Completed Part B What is the maximum emf induced in the antenna? The car's speed is 25.0 m/s on a horizontal road. Express your answer to two significant figures and include the appropriate units. ? E = Value Units Submit Request Answer < Return to Assignment Provide Feedback P Type here to search 48% Lenovo Esc F1

I Review | Constants | Periodic Table A cyclotron is used to produce a beam of high-energy deuterons that then collide with a target to produce radioactive isotopes for a medical procedure. Deuterons are nuclei of deuterium, an isotope of hydrogen, consisting of one neutron and one proton, with total mass 3.34 x 10-27 kg. The deuterons exit the cyclotron with a kinetic energy of 3.60 MeV. Part A What is the speed of the deuterons when they exit? Express your answer with the appropriate units. HẢ ? > V = 18583.9413 You have already submitted this answer. Enter a new answer. No credit lost. Try again. Submit Previous Answers Request Answer Part B If the magnetic field inside the cyclotron is 1.25 T, what is the diameter of the deuterons' largest orbit, just before they exit? Express your answer with the appropriate units. HẢ ? d = Value Units Submit Request Answer Part C If the beam current is 420 µA how many deuterons strike the target each second? Express your answer as the number of…

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Part A A potential difference of 45 mV develops between the ends of a 18-cm-long wire as it moves through a 0.25 T magnetic field. The wire's velocity is perpendicular to the field. What is the wire's speed? Express your answer with the appropriate units. HẢ Value Units

I Review | Constants A 10-cm-diameter parallel-plate capacitor has a 1.0 mm spacing. The electric field between the plates is increasing at the rate 9.0x105 V/m s. Part A You may want to review (Pages 884 - 886). What is the magnetic field strength on the axis? Express your answer to two significant figures and include the appropriate units. HÀ B = Value Units Submit Request Answer Part B What is the magnetic field strength 3.5 cm from the axis? Express your answer to two significant figures and include the appropriate units. HÁ ? B = Value Units Submit Request Answer • Part C What is the magnetic field strength 6.7 cm from the axis? Express your answer to two significant figures and include the appropriate units. ? B = Value Units Submit Request Answer

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In a physics laboratory experiment, a coil with 230 turns enclosing an area of 10 cm? is rotated in a time interval of 0.050 s from a position where its plane is perpendicular to the earth's magnetic field to a position where its plane is parallel to the field. The earth's magnetic field at the lab location is 6.0x10-5 T. Part A What is the magnetic flux through each turn of the coil before it is rotated? Express your answer with the appropriate units. ? Value Units Part B What is the magnetic flux through each turn of the coil after it is rotated? Express your answer with the appropriate units. ? 2 = Value Units

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