Lab 07 - Motional emf and Induced Current (1)

QUESTION 4 What is the direction of the induced current? AA B (outward) vAt O A. clockwise O B. counterclockwise QUESTION 5 Refer to the figure in the previous question. What is the emf induced when a 5.41-cm conducting rod attached to a U-shaped conductor moves at 1.1 m/s perpendicular to a magnetic field of strength 17.4 T? Please the numeric answer in terms of V (volts). Normal format with 3 SF, QUESTION 6 Find the magnitude of the induced emf in a circular coil with 27 loops and a radius 6.82 cm. The coil begins completely outside any magnetic field, and then during the next 12.5 seconds it moves completely into a uniform 4.75-T magnetic field. Assume that the plane of the loop and the direction of motion are both perpendicular to the magnetic field. Express your answer in Volts. Normal format with 3 SF.

Figure 3 shows a straight wire carrying a current in upwarddirection. The wire is placed near a wire loop. For each case described below, answer the following questions:a. What is the direction of the magnetic flux through theloop?b. Is the magnitude of the flux through the loop increasing ordecreasing with time?c. What is the direction of the magnetic field produced by theinduced current in the loop?d. What is the direction of the current induced in the loop?1. Case 1: The current is increasing.2. Case 2: The current is decreasing.3. Case 3: The current is constant but the loop is being pulledaway from the straight wire.

Constants A 17-cm-diameter circular loop of wire is placed in a 0.58-T magnetic field. Part A When the plane of the loop is perpendicular to the field lines, what is the magnetic flux through the loop? Express your answer to two significant figures and include the appropriate units. HÀ ? Value Units Submit Request Answer Part B The plane of the loop is rotated until it makes a 45 ° angle with the field lines. What is the angle in the equation PB BA cos 0 for this situation? Express your answer using two significant figures. Πν ΑΣφ ? = Submit Request Answer

! Required information A long straight wire carrying a current /is in the plane of a circular loop of wire. The current / is decreasing. Both the loop and the wire are held in place by external forces. The loop has resistance 33.2 Q. I -Long wire Conducting loop At one instant, the induced current in the loop is 80.1 mA. What is the rate of change of the magnetic flux through the loop at that instant in webers per second? Wb/s

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E2 The two plates in figure 6 are infinite both in the directionof ?̂ as in ?̂. Determine the magnetic induction producedfor current distribution. ?⃗ =?0?̂ for− ? < ? < 0?⃗ = −?0?̂ for 0 < ? < a

108. A beam of singly ionized helium is injected into the velocity selector at right. The electric field is 25 kN/C directed up. Note: c = 3 x 108 m/s a. What magnitude and direction magnetic field is necessary to select ionized helium at 0.05c? Mathematical Analysis b. Would this selector also work with doubly ionized helium at 0.05c? c. If the beam is replaced with a beam of neutral helium, what happens to neutral helium atoms traveling at 0.05c?

Question A loop conductor of area 1.0 m2 is positioned perpendicular to a uniform 1.5 T magnetic field. Parts a. What is the emf induced when the area of the loop changes to 1.5 m2 in 0.1 seconds? b. What is the emf induced if the loop has 10 turns?   Please provide steps and explanations, I am struggling to understand this section in physics. Thank you!

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

In the figure below, a sliding conducting rod in contact with the wires of a circuit is sliding at a speed v. The circuit is in a uniform magnetic field directed out of the page. R sliding bar a) Sketch the direction of the induced magnetic field from the circuit. b) Sketch the direction of the induced current in the circuit. c) Indicate the direction of the force on the sliding bar from the external magnetic field. d) Will the speed of the sliding bar increase, decrease, or stay the same?

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

1. In a charging capacitor, which of the following phenomenon is considered in Ampere's lawa. current density b. conduction currentc. opposing change in current d. displacement current2) Which of the following events result to a zero magnetic force? a whenever the charge is accelerating in the magnetic field b whenever the charge is decelerating in the magnetic field c The answer can be found on more than one of the choices. d when a charge is moving along the direction of the magnetic field 3) What should we do to a toroid for it to produce more magnetic field at the center of its cross-section?a Wind the wire to more turns b Do not change the number of turns, but decrease the radius of each turn c Lessen the turns of the wire. d Do not change the number of turns, but increase the radius of each turn

Part A Faraday's law of induction deals with how a changing magnetic flux induces an emf in a circuit. Recall that magnetic flux depends on magnetic field strength and the effective area the field is passing through. We'll start our investigation by looking at the field strength around a bar magnet. Position the magnet around the coil so that the region labeled A in the figure below is inside the coil. Move the magnet slowly back and forth and observe the effect on the brightness of the bulb and the needle of the voltmeter. Repeat the same process for the other two regions. For which of the regions shown in the figure is the observed effect the strongest? OO оо Re C Region B The observed effect is the same for all three regions. Region A A Submit Request Answer N S B с

Part A Faraday's law of induction deals with how a changing magnetic flux induces an emf in a circuit. Recall that magnetic flux depends on magnetic field strength and the effective area the field is passing through. We'll start our investigation by looking at the field strength around a bar magnet. Position the magnet around the coil so that the region labeled A in the figure below is inside the coil. Move the magnet slowly back and forth and observe the effect on the brightness of the bulb and the needle of the voltmeter. Repeat the same process for the other two regions. For which of the regions shown in the figure is the observed effect the strongest? Region C The observed effect is the same for all three regions. O Region A O Region B Submit Request Answer A N S B C

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1. What is the difference between magnetic field and LOOP FIELD magnetic flux? 2. Consider the magnetic field lines surrounding a disc magnet as pictured at right. The magnet moves from right to left through the wire loop. Describe how the magnetic flux through the surface defined by the loop changes (if at all) as the magnet 1) approaches the loop, 2) passes through the loop, and 3) recedes from the loop. Sketch a graph of magnetic flux through the surface vs. time as the magnet undergoes this motion, DISC MAGNET

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The loop in the figure is being pushed into the 0.60 T magnetic field at 25 m/s. The resistance of the loop is 0.50 2. (Figure 1) You may want to review (Pages 849 - 851). Part A What is the magnitude of the current in the loop? Express your answer with the appropriate units. Value Submit Part B Request Answer Units clockwise What is the direction of the current in the loop? O counterclockwise ? Submit Request Answer

1. Figure 1 below shows an electron moving in +x direction enter uniform magnetic field directed into the plane. Draw the path taken by the electron as they pass through the magnetic field region and leave from side QR. If another electron enters the same region with higher velocity, what happen to the path travel by the electron? Sketch the electron motion on the same diagram and explain your answer. electron Figure 1

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LOOP FIELD DISC MAGNET flux? 2. Consider the magnetic field lines surrounding a disc magnet as pictured at right. The magnet moves from right to left through the wire loop. Describe how the magnetic flux through the surface defined by the loop changes (if at all) as the magnet 1) approaches the loop, 2) passes through the loop, and 3) recedes from the loop. Sketch a graph of magnetic flux through the surface vs. time as the magnet undergoes this motion.

I Review I Constants I Periodic Table The magnetic field at the center of a 0.80-cm- diameter loop is 2.3 mT. Part A What is the current in the loop? Express your answer using two significant figures. ΑΣφ DA I = A Submit Request Answer Part B A long straight wire carries the same current you found in part a. At what distance from the wire is the magnetic field 2.3 mT ? Express your answer using two significant figures. V Αφ ? L = m Submit Request Answer

Q1) An infinite long wire carries current I = 4 A upward is placed parallel to the longest sides of a rectangular loop that carries I2 = 12.5 A moving clockwise. If the distance between the infinite wire and the nearest side is 0.2 m and the rectangular loop has dimensions of 0.1 mX 0.3 m. Perform the following task. 1.1. Draw a model that illustrate the set up of the question and show all the forces that is associated to the two wires.

In the figure below we have a wire loop with resistance R. in the gray area, magnetic field is constant and equal to B Figure1 We assumed that wire loop in the figure below has a resistance R so the current generated is : I=vBh/R But what if R=0 (perfectly conductive material) What happens when we move the loop with speed v?

Q14 Please solve this question correctly in 15 minutes in the order to get positive feedback Hundred percent correct answer needed. Please provide me efficient answer and get the thumbs up

Use Imageto answer part 8

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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

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