An aluminum bar moves with a speed 2m/s between two copper roads in a magnetic field of 2T as indicated on the figure. The distance between the cooper roads is 10m. The aluminum bar is always in contact with cooper roads and moves without friction. A voltmeter is coupled between the roads. What is the potential measured by the voltmeter (in volt), if the resistance of the rods and aluminum bar are consider to be negligible?
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An aluminum bar moves with a speed 2m/s between two copper roads in a magnetic field of 2T as indicated on the figure. The distance between the cooper roads is 10m. The aluminum bar is always in contact with cooper roads and moves without friction. A voltmeter is coupled between the roads. What is the potential measured by the voltmeter (in volt), if the resistance of the rods and aluminum bar are consider to be negligible?
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- A spark can jump between two nontouching conductors if the potential difference between them is sufficiently large. A potential difference of approximately 940 V is required to produce a spark in an air gap of 1.0 x 104 m. Suppose the light bulb in the figure is replaced by such a gap. How fast would a 2.55-m rod have to be moving in a magnetic field of 6.03 T to cause a spark to jump across the gap? Number Units X X X x X x X M X Conducting rail XA 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 in (Figure 1). 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 0.73 m2 resistance and a mass of 7.0 g. Ignore the resistance of the rails. At some moment, the power supply is switched on. For the steps and strategies involved in solving a similar problem, you may view a Video Tutor Solution. Figure 1.2 V X X 15 cm x X X xax X X X X What is the current? Express your answer with the appropriate units. I = Submit Value Part D μÅ Part B Complete previous part(s) Part C Complete previous part(s) Uf = Request Answer LO What will be the wire's speed after it has slid a distance of 1.0 mm? Express your answer with the appropriate units. O μA Units Value ? Units ?A jet develops a 0.9 V potential difference between the tips of its wings when flying above a region of the earth where the earth's magnetic field points essentially vertically upward and has a strength of about 39 T (10-6 T). If the jet's wingspan is 35 m, what is its speed? Give your answer in km/s.
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- 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 in (Figure 1). 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 4.4 g . Ignore the resistance of the rails. The power supply is switched on. What is the current?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 BOTHA 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 in (Figure 1). A 1.2 VV 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 0.97 mΩmΩ resistance and a mass of 9.0 gg. Ignore the resistance of the rails. At some moment, the power supply is switched on. What will be the wire's speed after it has slid a distance of 1.0 mm?
- The diagram below shows two long parallel wires, A & B. The direction of the current for each wire is indicated in the diagram. The current in wire A is 1.7 A & the current in wire B s 1.6 A. Determine the magnitude & direction of the net B-field at point P. The distance between A & P is 0.99 m & the distance between B & P is 0.49 m. P A Bnet = direction of Bnet o relative to the horizontal in Choose quadrant BA circuit is set up as the figure below. . (a) Find current I₁ and I2. (b) If the 3 resistor is a heater and is heating a cup of 30 g of water and 10 g of ice that is originally at 0°C. What would be the final temperature of the water after 30 minutes? (c) Draw two arrows at location P to show the direction of magnetic field due to Wirel and Wire2, respectively. 18 V L 4Ω M 202 12 02 P 1₁ AAA 1Ω Wire1 Wire2 3ΩTrue or False A moving charge entering a magnetic field parallel to the field will move in a straight line. A man whose resistance is 10,000 Ω has 120 volt potential difference across his body. This would cause a fatal shock. Adding resistors to a parallel circuit decreases the equivalent resistance. The resistance of a resistor increases with decreased temperature The terminal voltage (V) of a battery is always less than its EMF (ξ). The electric field E is a scalar but the electric potential V is a vector.