Question
In: Electrical Engineering
Permanent magnets are commonly used for what part of the starter?
Permanent magnets are commonly used for what part of the starter?
a. Armature
b. Solenoid
c. Field coils
d. Commutator
Solutions
Expert Solution
Field coils:- Field coils are made of permanent magnets. A permanent magnet maintains constant
field strength and provide a strong magnetic field inside the starter.
The permanent magnets used are an alloy of iron, boron, and neodymium and are powerful.
Hence, the correct option is c.
Armature:- The armature is present inside the field coils and is supported with bushings or ball
bearings at both ends, which enables it to rotate.
The armature is made of thin, circular disks of steel laminated together and wound with heavy
gauge insulated copper wire.
Solenoid:- Solenoid is an electromagnetic switch containing two separate but connected
electromagnetic windings.
Commutator:- A commutator reverses the direction of current between rotor and external circuit.
The commutator is made of a set of copper segment bars.
Thus, a, b and d are the incorrect option.
Dr. OWL answered 4 years agoRelated Solutions
Permanent magnets are made from?
Permanent magnets are made from?
A. paramagnetic materials
B. diamagnetic materials
C. ferromagnetic materials
D. dielectric materials
Describe some of the similarities between the permanent magnets and electromagnets
Describe some of the similarities between the permanent magnets and
electromagnets
A hydroelectric with 0.2 m radius coils has permanent magnets that immerse the coils in a...
A hydroelectric with 0.2 m radius coils has permanent magnets
that immerse the coils in a magnetic field of 0.5 T. If the maximum
torque that the turbines can produce is 750 Nm and it is sought to
generate a maximum voltage of V = (1414.3 V) sin (wt) at an average
rms power of 2x10 ^ 4 W. a) What maximum current the turbine should
generate, b) how many turns should the coil have, c) what radius
should the...
A hydroelectric with 0.2 m radius coils has permanent magnets that immerse the coils in a...
A
hydroelectric with 0.2 m radius coils has permanent magnets that
immerse the coils in a magnetic field of 0.5 T. If the maximum
torque that the turbines can produce is 750 Nm and it is sought to
generate a maximum voltage of V = (1414.3 V) sin (wt) at an average
rms power of 2x10 ^ 4 W. a) What maximum current the turbine should
generate, b) how many turns should the coil have, c) what radius
should the...
Part (a) The cyclopentadienyl anion (C5H5 - ) is commonly used aromatic ligand. The secular equations...
Part (a) The cyclopentadienyl anion (C5H5 - ) is commonly used
aromatic ligand. The secular equations for describing the
interactions of the five unhybridized p orbitals lead to a matrix
of the form:
( ?11 − ??11 ?12 − ??12 ?13 − ??13 ?14 − ??14 ?15 − ??15
?21 − ??21 ?22 − ??22 ?23 − ??23 ?24 − ??24 ?25 − ??25
?31 − ??31 ?32 − ??32 ?33 − ??33 ?34 − ??34 ?35 − ??35
?41...
Explain how electromagnets can be more useful than permanent magnets and provide a few examples Create...
Explain how electromagnets can be more useful than permanent
magnets and provide a few examples
Create a diagram of a simple circuit with a battery and a wire
and explain how your hand can be used to determine the direction of
the magnetic field that is created. Label the parts and direction
of conventional current. How would this diagram be different if
electron flow was used instead of conventional current? How would
the diagram be different if the direction of...
What are three other commonly used names for Diabetes Mellitus?
What are three other commonly used names for Diabetes
Mellitus?
A new refrigerator is being designed. Magnets will be used to hold the door closed, and...
A new refrigerator is being designed. Magnets will be used to
hold the door closed, and the rubber seal thickness can be selected
to adjust the separation between the magnets (and therefore the
force). The total length of rubber seal required to go around the
door is 6m, and the cost of rubber seal is given equation 2. The
pull force when opening the door should be 12N. Determine which of
the magnet combinations should be used, and the combined...
a) what are the two most commonly used measures of risk in finance. How are they...
a) what are the two most commonly used measures of risk in
finance. How are they related to each other?
b) why risk premium for assets (stocks) is determined by its
systematic risk only?
Assume, we hold well-diversified portfolio of 40 stocks and we
are adding random 5 stocks to it. How will addition of these stocks
affect expected return of the portfolio? Volatility (standard
deviation) of the portfolio?
8. What protein modification is commonly used to transduce signaling cascades?
8. What protein modification is commonly used to transduce
signaling cascades?
ADVERTISEMENT
ADVERTISEMENT
Latest Questions
- 3) You are rolling a 12 sided die 8 times. a) What is the size for...
- explain the difference between quantitative and qualitative research strategies. Provide an example of a crime based...
- use postorder and inorder tree traversals to make preorder traversal. #!/usr/bin/env python3 # encoding: UTF-8 """Turning...
- 1. Write an if-else statement to describe an object. Print "Balloon" if isBalloon is true and...
- An investor is considering purchasing a Treasury bond with a 20 year maturity, an 8% coupon...
- Write a program that copies the contents of one file to a destination file. This program...
- how to conduct a marketing mix for 3d crest white strips
ADVERTISEMENT