Physics, 20.07.2019 23:30 turtlesage21
An electric motor is connected to a battery. the current flows through brushes to a commutator ring, which is attached to an electromagnet turning through a permanent magnetic field. what is the purpose of the commutator ring? it turns the electromagnet in the opposite direction. it keeps the electromagnet from losing its magnetism. it periodically reverses the current flow through the electromagnet. it allows mechanical energy to be converted into electrical energy.
Answers: 1
Physics, 21.06.2019 18:50, NycLife
How does the image distance (di) of a convex lens compare with the image distance of a concave lens? a. the image distance of the convex lens is positive, and that of the concave lens is negative. b. both are negative for a virtual image. c. both are positive for a virtual image d. the image distance of the convex lens is negative, and that of the concave lens is positive.
Answers: 1
Physics, 22.06.2019 03:40, AkramMasoud
Which types of electromagnetic waves have higher frequencies than the waves that make up ultraviolet light? check all that apply. radio waves infrared light microwaves gamma rays visible light x-rays
Answers: 2
Physics, 22.06.2019 04:30, tayveon122
Light that is polarized along the vertical direction is incident on a sheet of polarizing material. only 96% of the intensity of the light passes through the sheet and strikes a second sheet of polarizing material. no light passes through the second sheet. what angle does the transmission axis of the second sheet make with the vertical?
Answers: 2
An electric motor is connected to a battery. the current flows through brushes to a commutator ring,...
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