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3 years ago

A DC motor operates because the loop constantly rotates, therefore creating _____?

Physics

1 answer:

Gennadij [26K]3 years ago

4 0

Answer:

A DC motor operates because the loop or the coil constantly rotates and therefore creates a torque in the presence of the magnetic field created in between two magnetic poles.

Explanation:

Working of a DC Motor

A DC motor is composed of an armature which is a current carrying coil, placed in between two opposite ends of magnets (North and south poles). This armature works as an electromagnet when places in the magnetic field of two magnet poles.

It thus, experiences a force according to the right hand rule and the torque is created with the interplay of the fixed magnetic field and the flow of current in the armature.

There are two brushes linked with two commutators that are further attached with the ends of the coils. The brushes are directly connected with the two terminals of the battery.

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Plz help this is so confusing

Nata [24]

Answer:

5 Km/h

Explanation:

From the question given above, the following data were obtained:

Distance travelled = 10 Km

Time = 2 hours

Speed =?

Speed is simply defined as the distance travelled per unit time. Mathematically, it can be represented as:

Speed = distance travelled /time.

With the above formula, we can obtain the speed at which the duck is travelling as follow:

Distance travelled = 10 Km

Time = 2 hours

Speed =?

Speed = distance travelled /time.

Speed = 10 / 2

Speed = 5 Km/h

Thus, the duck is travelling at a speed of 5 Km/h

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3 years ago

A light horizontal spring has a spring constant of 138 N/m. A 3.35 kg block is pressed against one end of the spring, compressin

BARSIC [14]

Answer:

$U_k = 0.113$

Explanation:

using the law of the conservation of energy:

$E_i -E_f=W_f$

$\frac{1}{2}Kx^2=NU_kd$

where K is the spring constant, x is the spring compression, N is the normal force of the block, $U_k$ is the coefficiet of kinetic friction and d is the distance.

Also, by laws of newton, N is calculated by:

N = mg

N = 3.35 kg * 9.81 m/s

N = 32.8635

So, Replacing values on the first equation, we get:

$\frac{1}{2}(138)(0.123)^2= (32.8635)U_k(0.281m)$

solving for $U_k$ :

$U_k = 0.113$

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4 years ago

Energy transformations when you cook sausages on a campfire burning wood

Rina8888 [55]

<span>Actually in this case heat energy is being transferred. Heat energy or thermal energy is transferred from the burning of wood to the sausages for it to be cooked. The sausage is being heated by the fire and is absorbing the heat or thermal energy.</span>

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3 years ago

Which of the following characteristics do all unicellular organisms share?

Fed [463]

Answer:

Asexual production they can be eukaryotes or prokaryotes

Explanation:

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3 years ago

What is a good hypothesis when putting pop rocks into soda?

8_murik_8 [283]

That it will erupt upon contact. Hope it helps!

6 0

3 years ago