Please answer all questions.. Thank you in advance! T/F? In a motor set-up, the
ID: 3349512 • Letter: P
Question
Please answer all questions.. Thank you in advance!
T/F? In a motor set-up, the coil of wire has a magnetic dipole moment that is always trying to align itself with the external magnetic field.
NOTE: You must provide an explanation for your answer to receive credit.
a. True
b. False
3) In this lab, we are building motors that only create torque during half of each rotation of the motor. Explain how practical electric motors are able to produce torque always in the same direction through 360 degrees of rotation of the motor. (See page 451 in your text, but note that there is an error in the diagram in the Application: Electric Motors box. The direction of rotation is incorrect. See if you can figure out why.)
4) To increase the torque of a motor, what could be done?
NOTE: You must provide an explanation for your answer to receive credit.
a. Increase Current
b. Decrease loop size
c. Increase Coils
d. Increase Magnetic field
e. More than two of these options
5) Which of the following physical manipulations of a system containing a loop of conductive wire and a magnetic field will result in the creation of electric current, thus transforming mechanical work into electrical energy?
NOTE: You must provide an explanation for your answer to receive credit.
a. Dropping a bar magnet through a loop of wire
b. Rotating a loop of wire in an external magnetic field (assume the area vector of the loop and the direction of the magnetic field begin parallel)
c. Pulling a loop of wire in and out of a region with an external magnetic field (assume the area vector of the loop and the direction of the magnetic field are parallel)
d. Both (a) and (b)
e. All of the above
6) Based on the Worked Example from last lesson, you can see that the faster you spin a generator, the more induced voltage and induced current you would produce with the generator. Note, though, that also would increase the frequency of the alternating current produced by the generator. Knowing that household electrical outlets always have 60 Hz AC, how do you suppose electric power plants increase or decrease the amount of electrical power they produce in response to changing demand, if they can't simply change the speed of their generators?
Please answer all questions.. Thank you in advance!
T/F? In a motor set-up, the coil of wire has a magnetic dipole moment that is always trying to align itself with the external magnetic field.
NOTE: You must provide an explanation for your answer to receive credit.
a. True
b. False
3) In this lab, we are building motors that only create torque during half of each rotation of the motor. Explain how practical electric motors are able to produce torque always in the same direction through 360 degrees of rotation of the motor. (See page 451 in your text, but note that there is an error in the diagram in the Application: Electric Motors box. The direction of rotation is incorrect. See if you can figure out why.)
4) To increase the torque of a motor, what could be done?
NOTE: You must provide an explanation for your answer to receive credit.
a. Increase Current
b. Decrease loop size
c. Increase Coils
d. Increase Magnetic field
e. More than two of these options
5) Which of the following physical manipulations of a system containing a loop of conductive wire and a magnetic field will result in the creation of electric current, thus transforming mechanical work into electrical energy?
NOTE: You must provide an explanation for your answer to receive credit.
a. Dropping a bar magnet through a loop of wire
b. Rotating a loop of wire in an external magnetic field (assume the area vector of the loop and the direction of the magnetic field begin parallel)
c. Pulling a loop of wire in and out of a region with an external magnetic field (assume the area vector of the loop and the direction of the magnetic field are parallel)
d. Both (a) and (b)
e. All of the above
6) Based on the Worked Example from last lesson, you can see that the faster you spin a generator, the more induced voltage and induced current you would produce with the generator. Note, though, that also would increase the frequency of the alternating current produced by the generator. Knowing that household electrical outlets always have 60 Hz AC, how do you suppose electric power plants increase or decrease the amount of electrical power they produce in response to changing demand, if they can't simply change the speed of their generators?
Explanation / Answer
2-True
As the coil tries to align itself towards external magnetic field , during this process coil rotates and thus the motor runs.
3-torque depend on current and flux of field.
But here only current is given in options .
So option A is correct.