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vekshin1
3 years ago
15

A device that changes mechanical energy to electrical energy by rotating a coil of wire through a magnetic field is called a(an)

Physics
2 answers:
fredd [130]3 years ago
8 0

The correct answer to the question is : B) Generator.

EXPLANATION:

As per the question, the mechanical energy is converted into electrical energy.

All the power plants like thermal power plant, nuclear power plant and hydroelectric power plant use the same concept to produce electric energy.

Let us consider hydro power plant.

In hydro power plant, the water falling with high speed is allowed to fall on a turbine. The kinetic energy of the water rotates the turbine. The turbine is attached to a generator.

The coil of wire attached to it is rotated through a magnetic field and electricity is produced due to electromagnetic induction.

Hence, the correct answer to the question is generator which converts mechanical energy into electrical energy.

tigry1 [53]3 years ago
4 0
A device that changes mechanical energy to electrical energy by rotatin a coil of wire through a magnetic field is called B. Generator
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A bus took 8 hours to travel 639 km. For the first 5 hours, it
vladimir1956 [14]

Answer:

93 km/h

Explanation:

Given that a bus took 8 hours to travel 639 km. For the first 5 hours, it travelled at an average speed of 72 km/h

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Speed = distance/time

Substitute speed and time

72 = F/5

F = 72 × 5 = 360 km

The remaining distance will be:

639 - 360 = 279km

The remaining time will be:

8 - 5 = 3 hours

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8 0
3 years ago
A charged particle enters a uniform magnetic field B with a velocity v at right angles to the field. It moves in a circle with p
alukav5142 [94]

A) d. 10T

When a charged particle moves at right angle to a uniform magnetic field, it experiences a force whose magnitude os given by

F=qvB

where q is the charge of the particle, v is the velocity, B is the strength of the magnetic field.

This force acts as a centripetal force, keeping the particle in a circular motion - so we can write

qvB = \frac{mv^2}{r}

which can be rewritten as

v=\frac{qB}{mr}

The velocity can be rewritten as the ratio between the lenght of the circumference and the period of revolution (T):

\frac{2\pi r}{T}=\frac{qB}{mr}

So, we get:

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The frequency of revolution of a particle in uniform circular motion is

f=\frac{1}{T}

where

f is the frequency

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We see that the frequency is inversely proportional to the period. Therefore, if the period of the more massive particle is 10 times that of the smaller particle:

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6 0
3 years ago
A standing wave is created on a string of length 1.2 m. If the speed of the wave on the string is 60.0 m/s, what is the fundamen
coldgirl [10]

Answer:

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6 0
3 years ago
Read 2 more answers
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