Q3 If the resistance of the moving coil device 20 2 and the total deviation of theindex is 120 degree when shedding effort 100 mV across both ends of the deviceand the dimensions of the file were 2.6 * 3.1 em, the number of turns 120 and thedensity of the electromagnetic flux 0.15 wb/m1- Calculate the control constant of the spring at rest.2- List the two types of moving coil instruments.

The objective of the question is to calculate the control constant of the spring at rest in a moving…

Answered: Q3 If the resistance of the moving coil…

Electric Motor Control

10th Edition

ISBN:9781133702818

Author:Herman

Publisher:Herman

Chapter3: Magnetic Starters

Section: Chapter Questions

Problem 17SQ

See similar textbooks

Similar questions

How can the polarity of an electromagnet be determined if the direction of current flow is known? 2. Define the following terms: 3. flux density 4. Permeability 5. Reluctance 6. Saturation Unit 13 Magnetic Induction 7. Name three factors that determine the amount of induced voltage in a coil. 8. What is the effect on induced voltage of adding more turns of wire to a coil? 9. Into how many time constants is an exponential curve divided? 10. Each time constant of an exponential curve is equal to what percentage of the maximum amount of charge? 11. An inductor has an inductance of 0.025 H and a wire resistance of 3 . How long will it take the current to reach its full Ohm's law value? Unit 15 Alternating Current . 12 What is the most common type of AC waveform? 13 How many degrees are there in one complete sine wave? 14 At what angle does the voltage reach its maximum negative value on a sine wave? 15 A sine wave…
1.Consider the magnetic core below.All dimensions are shown on the figure. The core is made up of legs with 2 different cross-sectional areas.The depth of core is 10cm.The relative permeability of the core is 2000. The current in the magnetising coil is 1 A. The number of turns of the coil is 2000.Calculate: (i)the reluctances and draw the magnetic circuit (ii)the flux in the core (iii)Flux densities B and field intensities H in legs having different cross-sectional areas. (iv)Verify Ampere's Law. Depth: 10 cm I=1A 20cm 2000 Turns 65cm 15cm 15cm 50cm 15cm ndo un of
com/courses/16221/quizzes/140568/take/questions/2862983 Question 4 How long will be the process of forming a full magnetic field around the coils? L1 1H L3 500mH 1kQ L2 B A 600mH Not coupled coils O Close to 0.875 sec O Close to 4.375 ms O Close to 4.38 sec O Close to 875 micro seconds « Previous No new data to save. Last checked at 2
A)The left hand rule for a coil is such that if you were to hold a coil in your left hand with your fingers pointing in the direction of the electron flow, your thumb would point in the direction of thea) electron flow b) flow lines c) face of the north pole d) none of the above. B) What is a magnetic flux line?a) It is the space around a magnet or the space in which the magnetic forces act.b) It is the magnetic force that has a definite direction at all points along a curved line from the north to south pole.c) It is the ability of a magnetic material to be easily magnetized.d) none of the above C)It is believed that a magnetic material is .........a) consists of a single large magnetic molecule b) is composed of many tiny magnetic molecules c) consists of a single non-magnetic molecule d) none of the above
A current in a 250 turn coil is 2.25A, wound in a core that has a reluctance of 12,000 AT/Wb. What is the resulting flux density (in Tesla), if the area of the core is 8cm²?
What is the difference between a thermal overload and a magnetic overload? Draw the symbol for each.
Solve all parts.
Please answer it in 30 mins. thank youu write your soln neat and complte
Answer question three
Determine the current, I, in figure 3 required to establish a flux in the gap of fg=2´10-4 Wb in the magnetic circuit of the following figure.
Define the following: Flux density Coercive force Residual magnetism Saturation
An iron circuit with a small 0.75 mm air gap is shown in Figure 1. A 6000 turn coil carries a current 1 = 18 mA which sets up a flux within the iron and across the air gap. The cross section of the iron is a consistent 0.8 cm², and the mean length of the flux path is 0.15 m. a) Redraw the magnetic circuit using schematic symbols of an electric circuit with reluctance in each part of the circuit. b) State's Ohm's Law for magnetic circuit. c) By neglecting the effect of fringing, calculate the reluctance of the circuit. d) Find the flux within the core. N = 6000 Iron circuit (t, = 800 for iron).

Recommended textbooks for you

Electric Motor Control

Electrical Engineering

ISBN:

9781133702818

Author:

Herman

Publisher:

CENGAGE L

Power System Analysis and Design (MindTap Course …

Electrical Engineering

ISBN:

9781305632134

Author:

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

Publisher:

Cengage Learning

Electricity for Refrigeration, Heating, and Air C…

Mechanical Engineering

ISBN:

9781337399128

Author:

Russell E. Smith

Publisher:

Cengage Learning

Electric Motor Control

Electrical Engineering

ISBN:

9781133702818

Author:

Herman

Publisher:

CENGAGE L

Power System Analysis and Design (MindTap Course …

Electrical Engineering

ISBN:

9781305632134

Author:

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

Publisher:

Cengage Learning

Electricity for Refrigeration, Heating, and Air C…

Mechanical Engineering

ISBN:

9781337399128

Author:

Russell E. Smith

Publisher:

Cengage Learning

SEE MORE TEXTBOOKS