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- In Niels Bohr’s 1913 model of the hydrogen atom, the single electron is in a circular orbit of radius 5.29 × 10−11 m and its speed is 2.19 × 106 m/s. (a) What is the magnitude of the magnetic moment due to the electron’s motion? (b) If the electron moves in a horizontal circle, counterclockwise as seen from above, what is the direction of this magnetic moment vector?An electron in a TV CRT moves with a speed of 6.0107 m/s, in a direction perpendicular to Earth's field, which has a strength of 5.0105 T. (a) What strength electric field must be applied perpendicular to the Earth’s field to make the election moves in a straight line? (b) If this is done between plates separated by 1.00 cm, what is the voltage applied? (Note that TVs are usually surrounded by a ferromagnetic material to shield against external magnetic fields and avoid the need for such a collection,)A particle moving downward at a speed of 6.0106 m/s enters a uniform magnetic field that is horizontal and directed from east to west. (a) If the particle is deflected initially to the north in a circular arc, is its charge positive or negative? (b) If B = 0.25 T and the charge-to-mass ratio (q/m) of the particle is 40107 C/kg. what is ±e radius at the path? (c) What is the speed of the particle after c has moved in the field for 1.0105s ? for 2.0s?
- (a) A cosmic ray proton moving toward the Earth at 5.00107m/s experiences a magnetic force of 1.701016N. What is the strength of the magnetic field it there is a 45° angle between it and the proton’s velocity? (b) Is the value obtained in part (a) consistent with the known strength of the Earth’s magnetic field on its surface? Discuss.A circular loop of wire of area 10 cm2 carries a current of 25 A. At a particular instant, the loop lies in the xy-plane and is subjected to a magnetic field B=(2.0i+6.0j+8.0k)103T . As viewed from above the xy-plane, the current is circulating clockwise. (a) What is the magnetic dipole moment of the current loop? (b) At this instant, what is the magnetic torque on the loop?Is B constant in magnitude for points that lie on a magnetic field line?
- PROBLEM 1. As shown in the figure, a uniform magnetic field B points upward, in the plane of the paper. Then the current is turned on in a long wire perpendicular to the paper. The magnetic field at point 1 is then found to be zero. From this information, draw the magnetic field vector at point 2 when the current is on. Draw the vector starting at the black dot. The location and orientation of the vector will be graded. The length of the vector will not be graded. Explain your reasoning. 2• H Wire 1.As shown in the figure, in the magnetic field directed inwards from the page plane, the current I passes on the bent wire with long edge, which is a, and with short edge, which is d. Write the net magnetic force on the wire in vector and find the direction.A +6.50 μC point charge is moving at a constant 8.00 × 106 m/s in the +y-direction, relative to a reference frame. At the instant when the point charge is at the origin of this reference frame, find the magnetic- field vector B it produces at point x = 0, y = -0.500 m, z = +0.500 m. Enter your answers numerically separated by commas. Bx, By, B₂ = Submit ΨΓ ΑΣΦ xa Xb 010 √x x x Previous Answers Request Answer X Incorrect; Try Again; 6 attempts remaining २४ Review | Constants Ć = ? |X| X.10n T
- The figure shows crossed uniform electric and magnetic fields and, at a certain instant, the velocity vectors of the 10 charged particles listed in the table. (The vectors are not drawn to scale.) The speeds given in the table are either less than or greater than E/B (see out of the page toward you after the instant shown in the figure? (Several choices may be Question 1). Which particles will move correct.) HUFI Particle Charge Speed 1 2 3 4 5 + + Less Greater Less Greater Less Particle Charge 6 7 10 10 + + Speed Greater Less Greater Less Greater 4If two magnetic field vectors H, and H2 are moving along the same axis in free space, write all the possible base vectors.As a model of the physics of the aurora, consider a proton emitted by the Sun that encounters the magnetic field of the Earth while traveling at 3.3 × 10³ m/s. Figure Z V Vparallel B Vperpendicular 700 < 1 of 1 Part A The proton arrives at an angle of 33" from the direction of B (refer to (Figure 1)). What is the radius of the circular portion of its path if B Express your answer to two significant figures and include appropriate units. LO Value Submit Part B Value Submit Part C Calculate the time required for the proton to complete one circular orbit in the magnetic field. Express your answer to two significant figures and include appropriate units. 6 A Value Submit Request Answer Units 6 A Request Answer ← Units C How far parallel to the magnetic field does the proton travel during the time to complete a circular orbit? This is called the pitch of its helical motion. Express your answer to two significant figures and include appropriate units. BI? C Units Request Answer ? 2.8 x 10-5…