Homework Answers
2.
- The electrical motor.
Note- An electric motor is an electrical machine that converts electrical energy into mechanical energy. Most electric motors operate through the interaction between the motor's magnetic field and electric current in a wire winding to generate force in the form of torque applied on the motor's shaft.
3 .
- Electromagnetic waves.
Note-Light is a form of electromagnetic radiation with a wavelength which can be detected by the human eye. It is a small part of the electromagnetic spectrum and radiation given off by stars like the sun.
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Question 2 Which device converts electric energy into mechanical work? O the electric motor O the...
An Electric Generator and an Electric Motor How are electric motors related to electric generators? Find the device pictured below, which is a direct-current electric generator. In this case, you pro...
An Electric Generator and an Electric Motor How are electric motors related to electric generators? Find the device pictured below, which is a direct-current electric generator. In this case, you provide the mechanical means of rotating the rotor by turning the crank. Plug the wire with dual alligator clips into the end of the electric generator, and attach these clips to a light-emitting diode (LED): hand-operated electric generator LED box Electric currents created by the magnetic forces present in a...
Question 10 5 pts A steam engine converts 1640 million Btu input energy obtained by burning a fuel into mechanical energy. The steam goes into the turbine at 210 °C and condensed water leaves the tur...
Question 10 5 pts A steam engine converts 1640 million Btu input energy obtained by burning a fuel into mechanical energy. The steam goes into the turbine at 210 °C and condensed water leaves the turbine at 21 °C. Assuming that the turbine operates as an ideal Carnot engine determine the mechanical energy output in MWh. Question 11 5 pts Which ones below are the benefits of hydroelectric power generation? O Hydro electric power don't depend on market conditions. Hydroelectric...
O longitudinal and transverse. O longitudinal D Question 2 3 pts An electromagnetic wave is propagating...
O longitudinal and transverse. O longitudinal D Question 2 3 pts An electromagnetic wave is propagating towards the east. At a certain moment the direction of the magnetic field vector associated with this wave points vertically up. What is the direction of the electric field vector? Horizontal and pointing south O Vertical and pointing up 0 Horizontal and pointing north O Vertical and pointing down 3 pts DQuestion 3 order of the electromagnetic spectrum from low to high wavelength? Which...
Help pls answer all . The fact that an electric current generates a magnetic field has...
Help pls answer all .
The fact that an electric current generates a magnetic field has allowed people to 20. cons ruct which of the following devices? (Choose as many as apply.) (A) ammeters (B) voltmeters (C) motors (D) none of these When a magnet is plunged into a coil of wire, the magnitude of the current induced is affected by which of the following? (Choose as many as apply.) (A) the speed with which the magnet is plunged into...
Q2 a) Define the following terms in instrumentation and electric machines theory: Intermediate transfer device, Sali...
Q2 a) Define the following terms in instrumentation and electric machines theory: Intermediate transfer device, Salient-pole machine. Deflection instrument. b)Calculate the induced emf and torque of a DC series motor which runs at 400 rpm and carries an armature current of 25A with a flux per pole of 40 mWb. The machine is 4-pole lap wound and has 56 slots, each housing 16 conductors on s armature. JEstablish the methods of speed control of armature diverters. dJA 3-phase, 6pole, 750...
QUESTION 19 A torque angle greater than 90°: A Indicates that the synchronous motor is now...
QUESTION 19 A torque angle greater than 90°: A Indicates that the synchronous motor is now acting as a generator B. Is not possible in a synchronous machine C. Indicates that the synchronous motor is now acting as a synchronous condensor D. None of the other choices are correct E. Indicates that the direction of rotation of the motor is reversed QUESTION 20 Which of the following statements is true about busses? O A None of the other choices are...
20 pts Question 4 Lasers can be constructed that produce an extremely high intensity electromagnetic wave...
20 pts Question 4 Lasers can be constructed that produce an extremely high intensity electromagnetic wave for a brief time- called pulsed lasers. They are used to ignite nuclear fusion, for example. Such a laser may produce an electromagnetic wave with a maximum electric field strength of 1.46x1011 V/m for a time of 0.97 ns. What is the energy in kJ delivered on a 1.09 mm2 area?
O yes QUESTION 2 A wave has period of 20 s. The frequency is Hz. QUESTION...
O yes QUESTION 2 A wave has period of 20 s. The frequency is Hz. QUESTION 3 A wave has frequency of 200 Hz. The period is s QUESTION 4 A rope wave travels at 20 m /s with a frequency of 4 Hz. The wavelength ism. Click Save and Submit to save and submit. Click Save All Answers to save all answers. /shsu blackboard.com/webapps/assessment/take/aunch.jsp?course assessment id- 220022 18course id- 118791.18 v Question Completion Status: QUESTIONS A rope wave has...
can you solve this 3 pts Question 18 The figure below shows the time variation of...
can you solve this
3 pts Question 18 The figure below shows the time variation of the magnitude of the electric field of an electromagnetic wave produced by a wire antenna. To which region of the electromagnetic spectrum does this wave belong? 10.0 3.0 7.0 E(N/C) + (x1023) 1.0 5.0 9.0 -10.0 radio waves O X-rays gamma rays visible light infrared radiation Question 10
Question 1 The change in electric potential energy is the negative of the work done by...
Question 1 The change in electric potential energy is the negative of the work done by the electric force. the work done by the electric force. the negative of the electric force. the electric force. . Question 2 The electric potential difference is . the same as the change in the electric potential energy. the change in the electric potential energy times the charge. the charge divided by the change in the electric potential energy. the change in the electric...
An Electric Generator and an Electric Motor How are electric motors related to electric generators? Find the device pictured below, which is a direct-current electric generator. In this case, you provide the mechanical means of rotating the rotor by turning the crank. Plug the wire with dual alligator clips into the end of the electric generator, and attach these clips to a light-emitting diode (LED): hand-operated electric generator LED box Electric currents created by the magnetic forces present in a...
Question 10 5 pts A steam engine converts 1640 million Btu input energy obtained by burning a fuel into mechanical energy. The steam goes into the turbine at 210 °C and condensed water leaves the turbine at 21 °C. Assuming that the turbine operates as an ideal Carnot engine determine the mechanical energy output in MWh. Question 11 5 pts Which ones below are the benefits of hydroelectric power generation? O Hydro electric power don't depend on market conditions. Hydroelectric...
O longitudinal and transverse. O longitudinal D Question 2 3 pts An electromagnetic wave is propagating towards the east. At a certain moment the direction of the magnetic field vector associated with this wave points vertically up. What is the direction of the electric field vector? Horizontal and pointing south O Vertical and pointing up 0 Horizontal and pointing north O Vertical and pointing down 3 pts DQuestion 3 order of the electromagnetic spectrum from low to high wavelength? Which...
Help pls answer all .
The fact that an electric current generates a magnetic field has allowed people to 20. cons ruct which of the following devices? (Choose as many as apply.) (A) ammeters (B) voltmeters (C) motors (D) none of these When a magnet is plunged into a coil of wire, the magnitude of the current induced is affected by which of the following? (Choose as many as apply.) (A) the speed with which the magnet is plunged into...
Q2 a) Define the following terms in instrumentation and electric machines theory: Intermediate transfer device, Salient-pole machine. Deflection instrument. b)Calculate the induced emf and torque of a DC series motor which runs at 400 rpm and carries an armature current of 25A with a flux per pole of 40 mWb. The machine is 4-pole lap wound and has 56 slots, each housing 16 conductors on s armature. JEstablish the methods of speed control of armature diverters. dJA 3-phase, 6pole, 750...
QUESTION 19 A torque angle greater than 90°: A Indicates that the synchronous motor is now acting as a generator B. Is not possible in a synchronous machine C. Indicates that the synchronous motor is now acting as a synchronous condensor D. None of the other choices are correct E. Indicates that the direction of rotation of the motor is reversed QUESTION 20 Which of the following statements is true about busses? O A None of the other choices are...
20 pts Question 4 Lasers can be constructed that produce an extremely high intensity electromagnetic wave for a brief time- called pulsed lasers. They are used to ignite nuclear fusion, for example. Such a laser may produce an electromagnetic wave with a maximum electric field strength of 1.46x1011 V/m for a time of 0.97 ns. What is the energy in kJ delivered on a 1.09 mm2 area?
O yes QUESTION 2 A wave has period of 20 s. The frequency is Hz. QUESTION 3 A wave has frequency of 200 Hz. The period is s QUESTION 4 A rope wave travels at 20 m /s with a frequency of 4 Hz. The wavelength ism. Click Save and Submit to save and submit. Click Save All Answers to save all answers. /shsu blackboard.com/webapps/assessment/take/aunch.jsp?course assessment id- 220022 18course id- 118791.18 v Question Completion Status: QUESTIONS A rope wave has...
can you solve this
3 pts Question 18 The figure below shows the time variation of the magnitude of the electric field of an electromagnetic wave produced by a wire antenna. To which region of the electromagnetic spectrum does this wave belong? 10.0 3.0 7.0 E(N/C) + (x1023) 1.0 5.0 9.0 -10.0 radio waves O X-rays gamma rays visible light infrared radiation Question 10
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