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3 years ago

In an electric motor, a commutator

Physics

2 answers:

alexdok [17]3 years ago

4 0

Answer:

b. Repeatedly reverses the flow of current through the armature.

Explanation:

The electric motor is a device that converts the electrical energy into mechanical energy.
The commutator is a device that repeatedly reverses the flow of current through the armature.
It is a split ring that acts as the commutator.
It connects the external circuit through a carbon brush and the armature of the motor.
Another important component of an electric motor is an electromagnet or permanent magnet.

Monica [59]3 years ago

4 0

Answer:

b on edg 2020

Explanation:

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A helicopter is ascending vertically. a passenger accidentally drops her wallet out the sides of the helicopter when it is 160 m

Advocard [28]

Answer:

(E)56.0 m/s

Explanation:

Height =h=-160 m

Because the wallet moving in downward direction

Time=t=7 s

Final speed of wallet=v=0

We have to find the speed of helicopter ascending at the moment when the passenger let go of the wallet.

$v^2-u^2=2gh$

Where $g=9.8 m/s^2$

Substitute the values

$0-u^2=2(-160)\times 9.8$

$u^2=3136$

$u=\sqrt{3136}=56m/s$

Option (E) is true

8 0

3 years ago

Newton's First Law of Motion states that an object will remain at rest or in uniform motion in a straight line unless acted upon

Leno4ka [110]

Law of inertia would be your answer.

4 0

3 years ago

Read 2 more answers

1. Looking at the planet vs. eccentricity table, which two planets have the greatest eccentricity?

AVprozaik [17]

Answer:

Pluto & Mercury

Explanation:

Pluto's eccentricity is 0.248

Mercury's eccentricity is 0.206

6 0

2 years ago

A satellite s is moving in an elliptical orbit around the earth . the mass of satellite is very small compared to mass of earth.

Contact [7]

The best and most correct answer among the choices provided by your question is the second choice or letter B.

<span>A satellite (s) is moving in an elliptical orbit around the earth has its angular momentum towards the earth changing in direction, but not in magnitude.</span>

I hope my answer has come to your help. Thank you for posting your question here in Brainly. We hope to answer more of your questions and inquiries soon. Have a nice day ahead!

8 0

3 years ago

The rope of a swing is 3.10 m long. Calculate the angle from the vertical at which a 76.0 kg man must begin to swing in order to

kakasveta [241]

Answer:

The angle from the vertical is 48.72°

Explanation:

Given :

Length of rope $l = 3.10$ m