All categories

3 years ago

What is an electric motor? Explain its operation.

2 answers:

7 0

An electric motor is an electrical machine that converts electrical energy into mechanical energy.

Electric motors work on the principal of the interaction between magnetic field electr-magnetism. A loop which is carrying the current is placed in a magnetic field. The loop will experience a torque. The torque starts rotating the coil and the propellers start to rotate when the current passes through the loop.

qwelly [4]3 years ago

4 0

Answer:

(Straight out of Physics textbook)

Explanation:

An electric motor is a slightly modified galvanometer. An electric motor current changes direction every time the coil makes a half revolution. Electric motors have greatly impacted the way of life. It made it possible to replace enormous human and animal toil by electric power all over the world.

You might be interested in

In what way are liquids different from

andrew11 [14]

Answer: The answer is C

3 0

3 years ago

Read 2 more answers

Five grams of sugar is dissolved in 50 grams of water what is the mass of the water

tangare [24]

The mass of the water with the sugar dissolved in it is 55 grams. This is because when you add the weight of the water, and the sugar that you added, it is 55.

7 0

3 years ago

Read 2 more answers

How do you increase the potential energy of an apple

m_a_m_a [10]

To increase the potential energy of any object, not limited to an apple, you have to hold it higher.

5 0

3 years ago

A spring has a natural length of 0.5 m and was stretched by 0.02 m. if the spring had a resultant energy of 0.5 j what is the sp

Anna71 [15]

$\textbf{2500 }\dfrac{\textbf{kg}}{\textbf{s}^{\textbf{2}}}$

Explanation:

Natural length of a spring is $0.5\text{ }m$ . The spring is streched by $0.02\text{ }m$ . The resultant energy of the spring is $0.5\text{ }J$ .

The potential energy of an ideal spring with spring constant $k$ and elongation $x$ is given by $\dfrac{1}{2}kx^{2}$ .

So, in the current problem, the natural length of the spring is not required to find the spring constant $k$ .

$\text{Potential Energy in the spring = }\dfrac{1}{2}kx^{2}\\0.5\text{ }J\text{ }=\text{ }\dfrac{1}{2}k(0.02\text{ }m)^{2}\\k\times0.0004\text{ }m^{2}\text{ }=\text{ }1\text{ }J\text{ }=\text{ }1\text{ }kg\frac{m^{2}}{s^{2}}\\k\text{ }=\text{ }\dfrac{1\text{ }kg\dfrac{m^{2}}{s^{2}}}{0.0004\text{ }m^{2}}\text{ }=\text{ }2500\text{ }\frac{kg}{s^{2}}$

∴ The spring constant of the spring = $2500\text{ }\frac{kg}{s^{2}}$

4 0

3 years ago

Anna learned that every magnet has a north and a south end called poles. One day, while she is playing with magnets she notices

My name is Ann [436]

Just from that one observation, choice-B
would be a reasonable conclusion.

4 0

3 years ago

Read 2 more answers