1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
juin [17]
3 years ago
6

A transformer has a primary voltage of 115 V and a secondary voltage of 24 V. If the number of turns in the primary is 345, how

many turns are in the secondary? A. 8 B. 690 C. 72 D. 1,653
Physics
1 answer:
Nata [24]3 years ago
4 0

Answer:

C. 72

Explanation:

Transformer: A transformer is an electromagnetic device that uses the property of mutual inductance to change the voltage of alternating supply.

In a ideal transformer,

Vs/Vp = Ns/Np ............................................. Equation 1

Where Vp = primary voltage, Vs = secondary voltage, Ns = Secondary turn, Np = primary turn.

Making Ns the subject of the equation,

Ns =(Vs/Vp)Np .......................................... Equation 2

Given: Vs = 24 V, Vp = 115 V, Np = 345.

Substitute into equation 2

Ns = (24/115)345

Ns = 72 turns.

Thus the number of turns in the secondary = 72 turns.

The right option is C. 72

You might be interested in
A diver can change his rotational inertia by drawing his arms andlegs close to his body in the tuck position. After he leaves th
NeX [460]

Answer:

3.14946 rad/s

Explanation:

I_i = Intial moment of inertia

I_f = Final moment of inertia

\omega_i = Initial angular velocity

\omega_f = Final angular velocity = \dfrac{2}{1.33}\times 2\pi\ rad/s

\dfrac{I_f}{I_i}=\dfrac{1}{3}

In this system the angular momentum is conserved

L_i=L_f\\\Rightarrow I_i\omega_i=I_f\omega_f\\\Rightarrow \omega_i=\dfrac{I_f\omega_f}{I_i}\\\Rightarrow \omega_i=\dfrac{1\times \dfrac{2}{1.33}\times 2\pi}{3}\\\Rightarrow \omega_i=3.14946\ rad/s

The angular velocity when the diver left the board is 3.14946 rad/s

3 0
2 years ago
Which type of multiplexing is defined by wavelength instead of frequency?​ a. ​wdm b. ​cwdm c. ​dwdm d. ​fdm?
Rina8888 [55]
<span>Multiplexing is the process of combining numerous signal of data or sound on to a single carrier like an optical fiber by using different wavelengths. The type of multiplexing that is defined by wavelength instead of frequency is CWDM which is also known as Coarse Wavelength Division Multiplexing.</span>
6 0
3 years ago
In a given chemical reaction, the energy of the products is less than the energy of the reactants. Which statements is true for
Inessa05 [86]

Answer:It is an Endothermic reaction

Explanation:

Exothermic reaction

An exothermic reaction is one that releases energy in the form of heat or light.

Endothermic reaction

An endothermic reaction is one that absorbs energy in the form of heat or light.

7 0
2 years ago
Read 2 more answers
If the resistance in a circuit remains constant, what happens to the electric power when the current increases?
bearhunter [10]

If the resistance in a circuit remains constant and the current increases, then the power will increase. <em>(A)</em>

In fact, it'll increase as fast as the <em><u>square</u></em> of the current !  Like, if the current somehow increases to 3 times as much, the circuit will start using <u><em>9 times</em></u> as much power as it did before.

4 0
3 years ago
Read 2 more answers
A light has a wavelength of 5.06x10-7m. what is the frequency of the light?
Artyom0805 [142]

So, the frequency of that light approximately \sf{\bold{5.93 \times 10^{14} \: Hz}}

<h3>Introduction</h3>

Hi ! Here I will help you to discuss the relationship between frequency and wavelength, with the velocity constant of electromagnetic waves in a vacuum. We all know that regardless of the type of electromagnetic wave, it will have the same velocity as the speed of light (light is part of electromagnetic wave too), which is 300,000 km/s or \sf{3 \times 10^8} m/s. As a result of this constant property, <u>the shorter the wavelength, the greater the value of the electromagnetic wave frequency</u>. This relationship can also be expressed in this equation:

\boxed{\sf{\bold{c = \lambda \times f}}}

With the following condition :

  • c = the constant of the speed of light in a vacuum ≈ \sf{3 \times 10^{8} \: m/s} m/s
  • \sf{\lambda} = wavelength (m)
  • f = electromagnetic wave frequency (Hz)

<h3>Problem Solving</h3>

We know that :

  • c = the constant of the speed of light in a vacuum ≈ \sf{3 \times 10^{8} \: m/s} m/s
  • \sf{\lambda} = wavelength = \sf{5.06 \times 10^{-7}} m.

What was asked :

  • f = electromagnetic wave frequency = ... Hz

Step by step :

\sf{c = \lambda \times f}

\sf{3 \times 10^8 = 5.06 \times 10^{-7} \times f}

\sf{f = \frac{3 \times 10^8}{5.06 \times 10^{-7}}}

\sf{f \approx 0.593 \times 10^{8 - (-7)}}

\sf{f \approx 0.593 \times 10^{15}}

\boxed{\sf{f \approx 5.93 \times 10^{14} \: Hz}}

<h3>Conclusion :</h3>

So, the frequency of that light approximately \sf{\bold{5.93 \times 10^{14} \: Hz}}

<h3>See More :</h3>
  • What affects photon energy brainly.com/question/26434060
  • What is the foton energy brainly.com/question/26518899
7 0
1 year ago
Other questions:
  • Which option would it be
    15·1 answer
  • Where did beowulf and his warriors take the skull
    15·1 answer
  • 1)
    15·1 answer
  • A balloonist drops his camera from a height of 100 m while his balloon is ascending at 5 m/s. How
    10·1 answer
  • Assume a beam of light hits the boundary separating medium 1, with index of refraction n1 and medium 2, with index of refraction
    13·1 answer
  • The precision of a laboratory instrument is ± 0.05 g. The accepted value for your measurement is 7.92 g. Which measurements are
    15·2 answers
  • Convert an acceleration of 1km/h^2 into cm/8^2?
    8·1 answer
  • If u humans were able to have powers what would it be any form make ur own creation of powers
    9·2 answers
  • How can you show that pressure increases with the increase of force?​
    15·2 answers
  • Please help me! Uniform acceleration problem sheet:
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!