1.A certain laminated steel core has a permeability of 3000. The lenght is 0.0299 m and cross-sectional area of 0.066 m². What is the reluctance? /H 2. Two point charges exert force of 0.49 grams on each other. If the charges are 3.2 apart and with the same value. What is the valueof each charge? Use -980 cm/s². 3. The relative permeability of certain silicon steel is 4500. A certain magnetic loop consist of silicon steel of 0.0003 m square, 0.0004 long and an air gap of 0.0009. What is the reluctance of the magnetic circuit?

1.A certain laminated steel core has a permeability of 3000. The lenght is 0.0299 m and cross-sectional area of 0.066 m². What is the reluctance? /H 2. Two point charges exert force of 0.49 grams on each other. If the charges are 3.2 apart and with the same value. What is the valueof each charge? Use -980 cm/s². 3. The relative permeability of certain silicon steel is 4500. A certain magnetic loop consist of silicon steel of 0.0003 m square, 0.0004 long and an air gap of 0.0009. What is the reluctance of the magnetic circuit?

Power System Analysis and Design (MindTap Course List)

6th Edition

ISBN:9781305632134

Author:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Publisher:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Chapter3: Power Transformers

Section: Chapter Questions

Problem 3.7MCQ: Consider Figure 3.5. Match the following, those on the left to those on the right. (i) Im (a)...

See similar textbooks

Similar questions

What is a proton? Where does it normally exist in an atom, and what is its charge?
11. What is ionization potential?
Consider Figure 3.5. Match the following, those on the left to those on the right. (i) Im (a) Exciting current (ii) Ic (b) Magnetizing Current (iii) Ie (c) core loss current
A cylindrical copper rod having a diameter of 0.40 in has a resistance of 0.00264 Ω. Taking the resistivity of copper as 1.745 µΩ-cm at 20o C, determine the length of the rod in ft. resistance of the rod when it is drawn down to one-third of the initial diameter, the volume remaining unchanged. Assumed that the resistivity of the copper is not affected by the drawing process.
Neglecting losses and fringing effects and assuming the substrate of a stripline to have a thickness of 0.42 (mm) and a dielectric constant of 2.83, determine the required width (in mm) of the metal strip in order for the stripline to have characteristics resistance of 78 Ohms. No need for a solution. Just write your numeric answer in the space provided. Round off your answer to 2 decimal places.
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.
A copper wire 100 m long must experience avoltage drop of less than 1.5 V when a current of 2.5 A passesthrough it. Given that copper has an electrical conductivity of6.0E7 /(Ὠ-m), compute the minimum diameter of the wire.
Four dies of electric material having relative permittivities 4, 5, 6 and 7 and thicknesses of 2 mm, 3 mm, 4 mm and 5 mm respectively are placed between conductive plates measuring 50 mm x 50 mm. If 100 V is applied between the plates, find the electric stress across each material and the voltage across each material.
If we stretch a copper rod, making it 0.1% longer, how much will its resistance change? What behavior do we assume for copper in deformation?
A copper conductor with a circular cross-section radius of 1.025mm and a length of 15m carries 20A current.a) electric field strengthb) voltage drop between terminalsc) find the resistance
Discussions:Voltage Distribution and String Efficiency of a Model Suspension Insulator 1- Comment on the results obtained.2- Give reasons for unequal potential distribution over the string.3- What is the effect of this un equality on the insulators?4- Can value of the string efficiency being equal to 100%. Explain your answer.5- Outline methods used to equalize the potential across the units.6- Why an insulator is represented as a capacitor C? What are the assumptionmodes?
1. A given material has a resistance of 20 2 at room temperature (20°C) and 25 at a temperature of 85°C. a) Does the material have a positive or a negative temperature coefficient? Explain briefly. b) Determine the value of the temperature coefficient, a, at 20°C. c) Assuming the resistance versus temperature function to be linear, determine the expected resistance of the material at 0°C (the freezing point of water) and at 100°C (the boiling point of water).