Problem 2. A linear machine has the following characteristics: magnetic flux density B = 0.5 T into the page; length of the bar /=0.5 m; extemal resistor R=0.25 2; applied voltage V= 120 V. If this bar has a load of F = 20 N attached to it opposite the direction of motion, what is the steady-state speed of the bar? Neglect the resistance of the bar and friction forces.
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- Q4: Show detailed work and pay attention to the units. There are two different ways to calculate the potential difference across the bar, using the motional EMF expression or Faraday's Law. Show that both methods give the same answer. Use the right hand rule to figure out which end of the bar (A or B) will be at a higher potential due to the motion of the conductor in the field.John is using a cordless electric weed trimmer with a dc motor to cut the long weeds in his backyard. During normal operation the trimmer generates a back emf of 16 V when it is connected to an emf of 24 V dc. The total electrical resistance of the motor is 8.0 Ω. (a) How much current flows through the motor when it is running smoothly? (b) Suddenly the string of the trimmer gets wrapped around a pole in the ground and the motor quits spinning. What is the current through the motor now? (c) How does the amount of heat dissipated in the motor during normal operation compare to the amount of heat dissipated when the motor is stuck? Calculate the ratio of the two amounts.A conducting rod slides on two parallel conducting bars as shown below. The bars are connected through a 10 ohm resistor which has a voltmeter attached across it. The bars are separated by .15m in the y direction. A force F is applied to therod to keep the rodmoving in the x direction at constant speed of v=6m/s. A uniform B-field of B=3mT is perpendicular to the x-y plane and points into the page as shown. R= 3mT とミ/Sm R= 10L IN a) Determine the magnetic flux D(x) as a function of x. b) Calculate d®/dt in Wb/s c) Determine the magnitude of EMF measured by the voltmeter. d) Calculate the current through the resistor and its direction (CW or CCW). e) Determine the magnitude of the force required to pull rod. f) Determine the energy density stored in the B-field.
- A segment of wire 7.9 cm long is moving at a velocity of 5.85 m/s toward a parallel (much longer) wire which carries a current of 9.92 A. At a particular instant the wire segment is 6.9 cm away from the long, current-carrying wire. What is the induced emf (voltage) between the two ends of the wire segment? 5.32E-06 V 1.06E-05 V 1.60E-05 V 1.33E-05 VA square, 44.0-turn coil that is 13.0 cm on a side with a resistance of 0.900 2 is placed between the poles of a large electromagnet. The electromagnet produces a constant, uniform magnetic field of 0.400 T directed into the screen. As suggested by the figure, the field drops sharply to zero at the edges of the magnet. The coil moves to the right at a constant velocity of 3.10 cm/s. N-turn coil B into the screen VThe loop in the figure is being pushed into the 0.20 T magnetic field at 45 m/s . The resistance of the loop is 0.50 N. (Figure 1) You may want to review (Pages 849 - 851) . Figure 1 of 1 V В 5.0 cm
- 1. A 11.8 ?F capacitor is charged by a 25.0 V battery through a resistance R. The capacitor reaches a potential difference of 4.00 V at a time 3.00 s after charging begins. Find R. ________ kΩ 2.A proton moves perpendicular to a uniform magnetic field at a speed of 1.20 107 m/s and experiences an acceleration of 1.40 1013 m/s2 in the positive x-direction when its velocity is in the positive z-direction. Determine the magnitude and direction of the field. magnitude _______ PLEASE ANSWER BOTH3. A solenoid has radius 5.80 mm, length 11.0 cm, 5000 turns, and is placed with its axis of symmetryalong the x-axis, through the origin. A vector normal to the opening of the solenoid points to the right.We measure the resistance of the solenoid to be 14.0 Ω. The solenoid is in a region where thetemperature is 49.0°C and initially, there is an external magnetic field of 0.30 T in the +x direction.Then the magnetic field is turned off and drops to 0 T over 50.0 milliseconds.a. What is the magnitude of the average induced emf during the 50.0 milliseconds while the magneticfield magnitude decreases to 0?________________________b. What is the direction of the induced current, as viewed from the right? Answer clockwise,counterclockwise, or zero and show work or explain in words.________________________c. What is the magnitude of the induced current? ________________________d. What is the magnitude and direction of the induced magnetic field?A resistor R is connected between two parallel conducting rails separated by 30 cm, as shown in the diagram. A conducting bar maintains electric contact with the rails as it moves relative to them with constant velocity from x = 20 cm to x = 48 cm in 0.6 seconds. A uniform 0.8 T field points into the page. Calculate the induced electric potential difference between the two ends of the bar.
- A loop of wire enclosing an area of 0.09m2 has a magnetic field passing through its plane at an angle to the plane. The component of the field perpendicular to the plane is 0.12 T, and the component parallel to the plane is 0.05 T. What is the magnetic Flux through this coil? The magnetic Flux through the coil is _____T•m2.Ck H 4 ← 1 Q A Z O8 https://www.webassign.net/web/Student/Assignment-Responses/submit?dep=32014984&tags=autosave#Q4 目☆ At what speed (in meters per second) must the sliding rod in the figure below move to produce an emf of 1.00 V in a 1.65 T field directed perpendicular to the rods and into the page, given the rod's length is 28.5 cm? C 078²9 alt 2 W S m/s # "3. th G E D Application of Lenz's law Ⓡ C ® Ⓡ ® ® 5 Ⓡ Ⓡ Ⓡ Ⓡ RO B. Ⓡ & 8 8 ® R 4 R F RHR-2 O O ® V ® % Ⓡ Ⓡ Ⓡ O OB O 8 5 B₂ T H Q Search G 8 Ⓡ B O 8 8 Ax+ O AA= (AX Ⓡ @ 3R #Equivalent circuit Ⓡ Ⓒincreasing NO 6 Ⓡ 8 @ Y 8 H @ -0 & 8 & 7 AHR-1 L Pie U 12 J N 8 M 1 K ( < 9 O alt PO 72x@ لالالالال ctri ? 1 " + Protect your privacy with and Fingerprint Reader "prt sc pause 1 4 backspace ME delete for those on-the-go 1 enter HP ENVY x360 Get more done with the latest Intel® Core™ processor. t shift home lock 4 hp 1 end BANG & OLUFSEN 3-way micro-edge display Audio by Bang & Olufsen end 1 8 5 O 2 ** BANG & OLUFSEN py up 6:31 PM 7/3/2023 A…A device called a railgun uses the magnetic force on currents to launch projectiles at very high speeds. An idealized model of a railgun is illustrated as shown. A 1.2 V power supply is connected to two conducting rails. A segment of copper wire, in a region of uniform magnetic field, slides freely on the rails. The wire has a 0.85 mΩ resistance and a mass of 5.0 g. Ignore the resistance of the rails. When the power supply is switched on,a. What is the current?b. What are the magnitude and direction of the force on the wire?c. What will be the wire’s speed after it has slid a distance of 1.0 mm?