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Q5. In a electric machine, regenerative power is produce when.... a) both speed and torque...
Q5.8：The specifications of machine 5.8. For the machine in the previous question, calculate (a) its no-load speed (b)its rated efficiency-olcoxL-n/nN (c) the following when the speed is ze...
Q5.8：The specifications of machine
5.8. For the machine in the previous question, calculate (a) its no-load speed (b)its rated efficiency-olcoxL-n/nN (c) the following when the speed is zero (stall condition) (i)induced voltage (ii) nput current (ii) output torque (iv) ut power (v)output power (vi) efficiency (d) he speed (in rpm) when the torque is 0.2 Nm 5 A DC machine has a no-load speed of 10,000 rpm and a rated speed of 8,000 rpm when operating with its rated supply...
A pair of electric charges has a positive potential energy. This implies that: a) Both charges...
A pair of electric charges has a positive potential energy. This implies that: a) Both charges are positive b) Both charges are negative c) The charges have the same sign d) The charges have opposite signs I've already determined that D is wrong, so can you please explain to me which selection is right and why? Thank you.
Explain well please An electric dipole made of two charges of equal magnitudes and opposite signs...
Explain well please
An electric dipole made of two charges of equal magnitudes and opposite signs is placed in an electric field = (3.2 times 10^6 i + 2.7 times 10^6 j) N?C. The negative charge, -10 mu C, is located at the origin while the positive charge +10 mu C is located at the point (x, y, z) = (9 cm, 0, 0). What is the magnitude of the torque experienced by the dipole? a) 1.62 N middot m...
please explain, thanks An elevator is being lifted at a constant Motor speed by a steel...
please explain, thanks
An elevator is being lifted at a constant Motor speed by a steel cable attached to an electric motor. Which statement is correct? Cable A. The cable does positive work on the elevator, and the elevator does positive Elevator work on the cable. B. The cable does positive work on the elevator, and the elevator does negative work on the cable. C. The cable does negative work on the elevator, and the elevator does positive work on...
Problem 17.44: Torque and force on a dipole. Correct An electric dipole is in a uniform...
Problem 17.44: Torque and force on a dipole. Correct An electric dipole is in a uniform extenal electric field E as shown in the figure (Figure 1) Part C Which of the orientations in Part B is stable? Express your answer in degrees as an integer. View Available Hint(s) ΠνΠ ΑΣφ ? Submit Part D Which of the orientations in Part B is unstable? Express your answer in degrees as an integer. View Available Hint(s) ΠνΠ ΑΣφ ? 0= Submit...
Which of the following statements about electric field lines are true? (choose all that are true)...
Which of the following statements about electric field lines are true? (choose all that are true) a) They are only defined for positive charges. b) They are always tangent to electric field vectors. c) They are always perpendicular to charged surfaces. d) They are a simple way to visualize the electric field vectors. e) None of the above. If a negative charge is placed in an electric field, what direction will it be accelerated? a) In the direction of the...
10. Let (a, b) be a critical input of z = f(x,y). Which one of the...
10. Let (a, b) be a critical input of z = f(x,y). Which one of the following statements is True? Let D denote the "Big D". a. If D(a, b) = 0 the (a, b) results in a Saddle Point. b. If fx (a,b) and fy (a,b)are neither both positive nor both negative; that is have opposite signs then (a, b) results in a Saddle Point. c. If D(a, b) is positive and fu(a,b) is positive then (a, b) results...
Q5. A uniform electric field of magnitude E 360 V/m is directed in the positive X...
Q5. A uniform electric field of magnitude E 360 V/m is directed in the positive X direction. A proton moves from the origin to the point (x, y)-(30.0 cm, 40.0 cm). (a) Through what potential difference does the charge move? Show your work to score. (b) What is the change in the potential energy of the charge field system? Show your work to score. (c) In this uniform electric field E mentioned above, if an electron was released at rest...
Question 2 Why use dc motors when ac power is delivered on the line? a. dc...
Question 2 Why use dc motors when ac power is delivered on the line? a. dc motors are grandfathered in from a time when dc power was delivered to the customer. b. dc mototrs maintain a higher efficiency while having a wide torque-speed charateristic. c. ac motors are more complicated and challenging to make than dc motors. d. None of the above.
Q5.8：The specifications of machine
5.8. For the machine in the previous question, calculate (a) its no-load speed (b)its rated efficiency-olcoxL-n/nN (c) the following when the speed is zero (stall condition) (i)induced voltage (ii) nput current (ii) output torque (iv) ut power (v)output power (vi) efficiency (d) he speed (in rpm) when the torque is 0.2 Nm 5 A DC machine has a no-load speed of 10,000 rpm and a rated speed of 8,000 rpm when operating with its rated supply...
Explain well please
An electric dipole made of two charges of equal magnitudes and opposite signs is placed in an electric field = (3.2 times 10^6 i + 2.7 times 10^6 j) N?C. The negative charge, -10 mu C, is located at the origin while the positive charge +10 mu C is located at the point (x, y, z) = (9 cm, 0, 0). What is the magnitude of the torque experienced by the dipole? a) 1.62 N middot m...
please explain, thanks
An elevator is being lifted at a constant Motor speed by a steel cable attached to an electric motor. Which statement is correct? Cable A. The cable does positive work on the elevator, and the elevator does positive Elevator work on the cable. B. The cable does positive work on the elevator, and the elevator does negative work on the cable. C. The cable does negative work on the elevator, and the elevator does positive work on...
Problem 17.44: Torque and force on a dipole. Correct An electric dipole is in a uniform extenal electric field E as shown in the figure (Figure 1) Part C Which of the orientations in Part B is stable? Express your answer in degrees as an integer. View Available Hint(s) ΠνΠ ΑΣφ ? Submit Part D Which of the orientations in Part B is unstable? Express your answer in degrees as an integer. View Available Hint(s) ΠνΠ ΑΣφ ? 0= Submit...
10. Let (a, b) be a critical input of z = f(x,y). Which one of the following statements is True? Let D denote the "Big D". a. If D(a, b) = 0 the (a, b) results in a Saddle Point. b. If fx (a,b) and fy (a,b)are neither both positive nor both negative; that is have opposite signs then (a, b) results in a Saddle Point. c. If D(a, b) is positive and fu(a,b) is positive then (a, b) results...
Q5. A uniform electric field of magnitude E 360 V/m is directed in the positive X direction. A proton moves from the origin to the point (x, y)-(30.0 cm, 40.0 cm). (a) Through what potential difference does the charge move? Show your work to score. (b) What is the change in the potential energy of the charge field system? Show your work to score. (c) In this uniform electric field E mentioned above, if an electron was released at rest...
Question 2 Why use dc motors when ac power is delivered on the line? a. dc motors are grandfathered in from a time when dc power was delivered to the customer. b. dc mototrs maintain a higher efficiency while having a wide torque-speed charateristic. c. ac motors are more complicated and challenging to make than dc motors. d. None of the above.
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