7-The damping force is usually produced by A)Magnetic force B)Eddy currents C)Spiral spring D)Electrostatic force
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- Components of mechanical translational system are damper, torsional spring and mass Select one: True FalseFind the rolling force and its power. The weight of the car is 800 Kg The weight of each person is 75 Kg You may assume any missing parameters you need in the design appropriately (e.g., the rolling-resistance-power, air-resistance-power, the DC motor's parameters, ....etc)Find :- 1) the force on segment BC .2) the force on the triangular loop .3) the torque on the loop about the origin at A 4) the torque on the loop about the origin at C .
- You are working as an electrician in a large steel manufacturing plant, and you are in the process of doing preventive maintenance on a large DC generator. You have megged both the series and shunt field windings and found that each has over 10 M to ground. Your ohmmeter, however, indicates a resistance of 1.5 across terminals S1andS2. The ohmmeter indicates a resistance of 225 between terminals F1andF2. Are these readings normal for this type machine, or is there a likely problem? Explain your answer.Describe and please use detail how this problem is meant to be solved Explain one of the following items work. Provide as much detail about the physics principles in play and how they come into play, and how the different relevant variables would affect the behavior of your chosen object◦ @ motor◦ @ generator◦ @ magnetic damping system◦ @n electromagnet◦ @n inductorQuestion 3 a) Explain in detail anyone the following: i) Steady-state stability ii) Dynamic-state stability iii) Transient-state stability b. Explain the ‘equal area criterion’
- The coil of a moving-coil voltmeter is25 mm long and 25 mm wide and has 60 turns on it. The control spring exerts a torque of 1.58 x 10 Nm when the deflection is 100 divisions on full scale. If the flux density of the magnetic field in the air gap is 5 wb/m², estimate the resistance that must be put in series with the coil to give one volt per division. The resistance of the voltmeter coil may be neglected- Two forces are applied at the end of a screw eye in order to remove the post. Determine the angle and the magnitude of force F so that the resultant force acting on the post is directed vertically upward and has a magnitude of 750 N.subject: Statics of Rigid BodiesPlease with complete solution so that i can learn
- For a motor design, you need to design a solenoid coil that produces a magnetic flux density (B) of at least 2000 gauss when a 10 mA current flows through the conductor. Due to space limitations, the coil only can be 10 turns over a 1 cm length. To obtain the needed performance, go to Table 3 and choose a core material for the coil.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: a)magnetomotive force, mmf b)magnetic field intensity, H c)flux density, BThe electromagnet shown in the Fig. below is to be used to lift an iron slab of mass M=150 kg. The surface roughness of the iron is such that when the iron and the electromagnet are in contact, there is a minimum air gap of 0.2 mm in each leg. The electromagnet has infinite permeability and the crosssectional area Ac is 25 cm2. The number of turns of N-turn winding is 350 and the winding coil resistance is 3 Ω. Calculate the minimum coil voltage which must be used to lift the iron slab against the force of gravity. Neglect the reluctance of the iron.(Hint: Gravitational acceleration constant is 9.8 m/s2)