if a solenoid wire is 100ft long
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if a solenoid wire is 100ft long with 2000 turns in a bobbin with length between gap and and metal 0.1m and 30amps a)find newton of force of solenoid at 30amps 25v & .833 wire resistance
b) find wire cross sectional area
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- A wire of 59 in length and 4 mm2 has a resistance of 0.94 ohms. A 110-m length of wire of the same material has a resistance of 3 at the same temperature. Find the radius of this wire. The final unit must be in millimeter, mm.A solenoid is 40 cm long, has a cross sectional area of 8 cm2 and is wound with 300 turns of wire that carry a current of 1.2 A. The relative permeability of its core is 600. Find the flux through solenoid.An aluminum wire and a copper wire have the same resistance and the same length. Find the ratio of their diameters.
- 4) We usually think of wires as perfect (R=0) conductors, which is not quite accurate. Real wires have resistance albeit small - usually less than an ohm. With this in mind: a. Consider a uniform cylindrical copper wire that has diameter of 1 mm and is 10 m long. What is the resistance of this wire? The resistivity of copper is 1.72 x 10-8 9-m. b. This wire is cut in half, and the two strands are used to connect an electric heater to an outlet supplying 1500 W at 120 V. Draw a simple circuit diagram, including the voltage source, resistances of the connector wires, and the calculated resistance for the heater. C. How much of the total 1500 W is absorbed by the connector wires, not by the electric heater? d. If the specific heat and density of copper are 385 J/kg°C and 8940 kg/m³ respectively, how much will the connector wires heat up after 1 minute of use? (Assume all energy absorbed by the connector wires is converted to heat and remains in the copper wire.) Remember that E cmAT,…Q4/ Assume DC source with internal resistance 7.5 N, connect to load with 8 2 through copper wires with 1mm². What is the length of wire that maximizes the load power? (For copper resistivity =1.72×10*2.m).Two long, parallel wires are 6 m apart. They carry steady currents of 10 A each, in opposite directions. Place a third long wire in parallel with the two wires, at a distance of 5 m from each of the two wires. If we run a steady current of 10 A through the third wire, determine the force per unit length acting on the third wire by the other two wires. Use drawing to present your analysis. Make clear the directions of the currents and the force with these three long and parallel wires.
- An electromagnet shown below has a cross section area of 10 cm2 with a mean length of iron path of 100cm and mean length of airgap is 0.4cm . It is excited by a coil of 1000 turns of conductor windings. When a current of 1A is provided to the coil and the relative permeability of iron is 1300, then find the magnetic flux in the circuit. Select one: Oa. 1.25Wb O b. None of these Oc.0.00027Wb O d. 027W.An air gap has a length of 0.1 cm. What length of iron core has the same reluctance as the air gap? The relative permeability of the iron is 5000. Assume that the cross-sectional areas of the gap and the core are the same.Explain the hysteresis that can be found in materials due to force, magnetic and electrical subjection (give an example on two different materials below) show and explain the hysteresis curves for these materials. 1)High carbon steel 2)Cast iron
- Problem A potentiometer is an instrument for measuring an unknown voltage in comparison to a standard voltage. In the potentiometer shown in Figure 1.0 a 16.0-m stretch of wire AB is connected to a 9.00-V battery. The resistance per unit length of the wire is 16.0 0/mm. The movable contact P is at point B. An ammeter (circle with A inside) is connected to point A. 16.0 m A B www Figure: 1.0 A V = 9.00 VWhich of the following is not true for ferromagnetic materials? Please choose one: a. High?mthey have value. b.Above the Curie temperature, they lose their non-linear properties. C. a fixedµrthey have value. D.The energy loss is proportional to the area of the hysteresis loop.A solenoid similar to the figure below, has a core made of cast steel (refer to the figure on the next slide). It has a cross-sectional area of 4cm2 and a mean length of 20cm. The coil has 100turns, and the coil current is 3.2A. Find the following: d)Permeability, μ e) the relative permeability, μr f) the core reluctance, R and g) the flux, Ø