Question 1: Is the transformer an energy converting device or not? (explain shortly) Question2: If the...
Question 1: Is the transformer an energy converting device or not? (explain shortly)
Question2: If the speed of the rotor and rotating magnetic field (synchronous speed) is the same? What happpaned the induced voltager and force.
Homework Answers
The transformer is an energy transfer device that
transfers the electrical energy from the primary winding to the
secondary:-
Add Answer to:
Question 1: Is the transformer an energy converting device or
not? (explain shortly)
Question2: If the...
Q10. Based simply on the concept of rotor induction, explain what happens as the rotor approached...
Q10. Based simply on the concept of rotor induction, explain what happens as the rotor approached synchronous speed and why the rotor, practically, will always be slower than synchronous speed. What causes the rotor mmf? How must the rotor move with respect to the stator magnetic field in order to have a rotor mmf? What happens to torque as the rotor mmf (rotor flux density) decreases?
Q10. Based simply on the concept of rotor induction, explain what happens as the...
8A sensitive current indicating instrument is a 9 in a transformer, changes in the magnetic field...
8A sensitive current indicating instrument is a 9 in a transformer, changes in the magnetic field of the primary coil are sensed by the nearby secondary coil CO According to Faraday's law, these changes of magnetic field intensity at the secondary coil voltage in the secondary a. produce b. inducre c eliminate electric current by rotating a coil within a stationary magnetic field is a(n) a. Electric motor b. Generator 11 Clusters of aligned iron atoms are called a. Magnets...
8A sensitive current indicating instrument is a 9 in a transformer, changes in the magnetic field...
8A sensitive current indicating instrument is a 9 in a transformer, changes in the magnetic field of the primary coil are sensed by the nearby secondary coil CO According to Faraday's law, these changes of magnetic field intensity at the secondary coil voltage in the secondary a. produce b. inducre c eliminate electric current by rotating a coil within a stationary magnetic field is a(n) a. Electric motor b. Generator 11 Clusters of aligned iron atoms are called a. Magnets...
Question2 A5: Explain self and mutual induction Magnede Two coils, coil1 and coil2 are placed...
Question2 A5: Explain self and mutual induction Magnede Two coils, coil1 and coil2 are placed next to each other. Coil1 is connected to an alternating voltage V which supplies a changing current in coil 1 (i) Draw the diagram (i) Explain Induced emf by self inductance and label the diagram and (iii) Explain Induced emf by mutual inductance and label the same diagram (1,2,2 marks) Question3 B3: Explain mmf and list equations that links it to other factors (i)...
QUESTION 2 The voltage of an AC generator is controlled by? Increasing or decreasing the field...
QUESTION 2 The voltage of an AC generator is controlled by? Increasing or decreasing the field current Increasing or decreasing the armature current The number of slip rings QUESTION 3 The frequency of an AC generator is unknown. We know the number poles which 6 and we know the speed n which is 1200rpm. What is the frequency? 602. 50Hz 1200HZ QUESTION 4 The frequency of an AC generator is unknown. We know the number poles which 6 and we...
Explain the difference between transformer electromotive force and motional electromotive force in electromagnetic. Write down the...
Explain the difference between transformer electromotive force
and motional
electromotive force in electromagnetic. Write down the integral
equation for both
quantities.
QUESTION 3 (a) Explain the difference between transformer electromotive force and motional electromotive force in electromagnetic. Write down the integral equation for both quantities. [4 marks] (b) A circular plate with radius, a meter at x-y plane rotates in an anti-clockwise direction with a uniform angular velocity, o meter/second along the z-axis. The plate is placed in a uniform...
1 of 15 When a field is parallel to a plane of area, the magnetic flux...
1 of 15 When a field is parallel to a plane of area, the magnetic flux through the coil is A zero. B infinite. C 2. D 5. Question 2 of 15 A moving charge experiences magnetic forces because of a A magnetic flux. B magnetic field. C magnetic current. D both a and b. Question 3 of 15 Total number of magnetic field lines passing through an area is called A magnetic flux density. B magnetic flux. C emf....
TEST RESULTS: QAD STEPS TORQUE 1 2 3 4 5 6 7 2 10 11 12...
TEST RESULTS: QAD STEPS TORQUE 1 2 3 4 5 6 7 2 10 11 12 1710 1691 1678 1663 1645 16161605 1707 154 150 1949 1383 00 0.1 0.1 0.2 0.25 0.0.350.4 0.5 0.6 0.7 **** 0.8 10.700.76 0.78 0.82/0.91 18,98 1.05 1.12 1.25 142 45 1.85 TABLE 19-2 DE-BRIEFING The damper winding squirrel-cage) starts the rotor and gets it up to 90% synchronous speed. After DC is applied to the rotor field coil and the rotor pulls up...
Question 1: The armature of a small generator consists of a flat, square coil with 180...
Question 1: The armature of a small generator consists of a flat, square coil with 180 turns and sides with a length of 1.70 cm. The coil rotates in a magnetic field of 7.55×10−2 T. What is the angular speed of the coil if the maximum emf produced is 2.10×10−2 V? Question2: At the instant when the current in an inductor is increasing at a rate of 6.40×10−2 A/s , the magnitude of the self-induced emf is 1.65×10−2 V ....
1. (25 point) What is the principal difference between a synchronous machine and an induction machine?...
1. (25 point) What is the principal difference between a synchronous machine and an induction machine? 2. (25 point) What is the equation for the induced torque in an ac machine? 3. (50 point) The simple loop is rotating in a uniform magnetic field shown in Figure 3-3 has the following characteristics: B = 1.0 T to the right r= 0.1m 1 = 0.3m Wm = 377rad/s (1) Calculate the voltage etot (t) induced in this rotating loop. (2) What...
Q10. Based simply on the concept of rotor induction, explain what happens as the rotor approached synchronous speed and why the rotor, practically, will always be slower than synchronous speed. What causes the rotor mmf? How must the rotor move with respect to the stator magnetic field in order to have a rotor mmf? What happens to torque as the rotor mmf (rotor flux density) decreases?
Q10. Based simply on the concept of rotor induction, explain what happens as the...
8A sensitive current indicating instrument is a 9 in a transformer, changes in the magnetic field of the primary coil are sensed by the nearby secondary coil CO According to Faraday's law, these changes of magnetic field intensity at the secondary coil voltage in the secondary a. produce b. inducre c eliminate electric current by rotating a coil within a stationary magnetic field is a(n) a. Electric motor b. Generator 11 Clusters of aligned iron atoms are called a. Magnets...
8A sensitive current indicating instrument is a 9 in a transformer, changes in the magnetic field of the primary coil are sensed by the nearby secondary coil CO According to Faraday's law, these changes of magnetic field intensity at the secondary coil voltage in the secondary a. produce b. inducre c eliminate electric current by rotating a coil within a stationary magnetic field is a(n) a. Electric motor b. Generator 11 Clusters of aligned iron atoms are called a. Magnets...
Question2 A5: Explain self and mutual induction Magnede Two coils, coil1 and coil2 are placed next to each other. Coil1 is connected to an alternating voltage V which supplies a changing current in coil 1 (i) Draw the diagram (i) Explain Induced emf by self inductance and label the diagram and (iii) Explain Induced emf by mutual inductance and label the same diagram (1,2,2 marks) Question3 B3: Explain mmf and list equations that links it to other factors (i)...
QUESTION 2 The voltage of an AC generator is controlled by? Increasing or decreasing the field current Increasing or decreasing the armature current The number of slip rings QUESTION 3 The frequency of an AC generator is unknown. We know the number poles which 6 and we know the speed n which is 1200rpm. What is the frequency? 602. 50Hz 1200HZ QUESTION 4 The frequency of an AC generator is unknown. We know the number poles which 6 and we...
Explain the difference between transformer electromotive force
and motional
electromotive force in electromagnetic. Write down the integral
equation for both
quantities.
QUESTION 3 (a) Explain the difference between transformer electromotive force and motional electromotive force in electromagnetic. Write down the integral equation for both quantities. [4 marks] (b) A circular plate with radius, a meter at x-y plane rotates in an anti-clockwise direction with a uniform angular velocity, o meter/second along the z-axis. The plate is placed in a uniform...
TEST RESULTS: QAD STEPS TORQUE 1 2 3 4 5 6 7 2 10 11 12 1710 1691 1678 1663 1645 16161605 1707 154 150 1949 1383 00 0.1 0.1 0.2 0.25 0.0.350.4 0.5 0.6 0.7 **** 0.8 10.700.76 0.78 0.82/0.91 18,98 1.05 1.12 1.25 142 45 1.85 TABLE 19-2 DE-BRIEFING The damper winding squirrel-cage) starts the rotor and gets it up to 90% synchronous speed. After DC is applied to the rotor field coil and the rotor pulls up...
1. (25 point) What is the principal difference between a synchronous machine and an induction machine? 2. (25 point) What is the equation for the induced torque in an ac machine? 3. (50 point) The simple loop is rotating in a uniform magnetic field shown in Figure 3-3 has the following characteristics: B = 1.0 T to the right r= 0.1m 1 = 0.3m Wm = 377rad/s (1) Calculate the voltage etot (t) induced in this rotating loop. (2) What...
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