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
Rufina [12.5K]
3 years ago
13

A coil consists of 200 turns of copper wire and have a cross-sectional area of 0.8 mmm square.The mean length per turn is 80 cm

and the resistivity of copper is 0.02μΩm at normal working temperature.Calculate the resistance of the coil
Engineering
1 answer:
pav-90 [236]3 years ago
6 0

Answer:

The resistance of the coil is 4 Ω.

Explanation:

The resistance (R) of the coil can be calculated using the following equation:

R = \frac{\rho L}{A}

Where:

ρ: is the resistivity of copper = 0.02x10⁻⁶ Ωm

L: is the length of the coil

A: is the cross-sectional area = 0.8 mm² = 8x10⁻⁷ m²

The length of the coil is given by:

L = 200 turn* 80 cm/turn = 16000 cm = 160 m

Now, the resistance is:          

R = \frac{\rho L}{A} = \frac{0.02 \cdot 10^{-6} \Omega m*160 m}{8 \cdot 10^{-7} m^{2}} = 4 \Omega

Therefore, the resistance of the coil is 4 Ω.

                                       

I hope it helps you!

You might be interested in
Technician a s ays a shorted circuit can generate excessive heat. technician b says a shorted circuit will cause the circuit pro
Lerok [7]

Based on the information provided, the technician who is correct is: C. Both Technician A and Technician B.

<h3>What is an open circuit?</h3>

An open circuit can be defined as a type of electric circuit in which the continuity between the conducting wire (paths) has been broken or cut.

This ultimately implies that, an open circuit is designed and developed to prevent the flow of electric charges (electrons or currents) from one point in an electric circuit to another.

In Electrical engineering, a short usually causes an electric circuit protection device such as a fuse, circuit breaker, etc., to open when higher than normal current flows through the electrical circuit.

Read more on short circuit here: brainly.com/question/25018411

#SPJ1

Complete Question:

Technician A says a shorted circuit can generate excessive heat. Technician B says a shorted circuit will cause the circuit protection device to open. who is correct?

A. Technician A only

B. Technician B only

C. Both Technician A and B

D. Neither Technician A nor B

5 0
1 year ago
a motor has torque of 200 nm if i motors attached to an arm with a length of 25 cm and a string is too attached to the end appro
kogti [31]

Answer:

noescompa

Explanation:

puntos

8 0
3 years ago
A composite wall is composed of 20 cm of concrete block with k = 0.5 W/m-K and 5 cm of foam insulation with k = 0.03 W/m-K. The
wariber [46]

Answer:

4.8°C

Explanation:

The rate of heat transfer through the wall is given by:

q=\frac{Ak}{L}dT

\frac{q}{A}=\frac{k}{L}dT

Assumptions:

1) the system is at equilibrium

2) the heat transfer from foam side to interface and interface to block side is equal. There is no heat retention at any point

3) the external surface of the wall (concrete block side) is large enough that all heat is dissipated and there is no increase in temperature of the air on that side

{k_{fi}= 0.03 W/m.K

{L_{fi}= 5 cm = 0.05 m

{T_{fi}= 25 \°C

{k_{cb} = 0.5 W/m.K

{L_{cb}= 20 cm = 0.20 m

{T_{cb}= 0 \°C

{T_{m}= ? \°C = temperature at the interface

Solving for {T_{m} will give the temperature at the interface:

\frac{q}{A}=\frac{k_{fi} }{L_{fi} }(T_{fi} -T_{m})=\frac{k_{cb} }{L_{cb} }(T_{m} -T_{cb})

\frac{0.03}{0.05 }(25 -T_{m})=\frac{0.5}{0.2}(T_{m} -0})

15 -0.6T_{m}=2.5T_{m}

3.1T_{m}=15

T_{m}=4.8

3 0
3 years ago
The electricity generated by wind turbines annually in kilowatt-hours per year is given in a file. The amount of electricity is
Anika [276]

Answer:

Steps:

1. Create a text file that contains blade diameter (in feet), wind velocity (in mph) and the approximate electricity generated for the year

2.  load the data file for example, in matlab, use ('fileame.txt') to load the file

3. create variables from each column of your data

  for example, in matlab,  

     x=t{1}

     y=t{2}

4. plot the wind velocity and electricity generated.

   plot(x, y)

5. Label the individual axis and name the graph title.

    title('Graph of wind velocity vs approximate electricity generated for the year')

     xlabel('wind velocity')

     ylabel('approximate electricity generated for the year')

5 0
3 years ago
Read 2 more answers
Which of the following is true regarding screw gauges and shank?
agasfer [191]
correct me if i’m wrong i’m pretty sure it’s B i’ve had the same question
6 0
2 years ago
Other questions:
  • A simple ideal Rankine cycle with water as the working fluid operates between the pressure limits of 4 MPa in the boiler and 25
    14·2 answers
  • A stainless-steel specimen from the same material characterized up above, was formed into a rectangular cross-section of dimensi
    9·1 answer
  • What are example for mantle
    5·1 answer
  • How long does it take electrons to get from a car battery to the starting motor? Assume the current is 300 A and the electrons t
    10·1 answer
  • A soil element is subjected to a minor principle stress of 50 kPa on a plane rotated 20 ° counterclockwise from vertical. If the
    10·1 answer
  • A series RC circuit has a voltage of 24VAC and an impedance of 252ohms. What is the circuit current?
    6·1 answer
  • The hydrofoil boat has an A-36 steel propeller shaft that is 100 ft long. It is connected to an in-line diesel engine that deliv
    8·1 answer
  • scrapers are used to haul dirt from a borrow pit to the cap of a landfill. the estimated cycle time for the scrapers is 9.5 minu
    14·1 answer
  • QUICK!<br> WHAT DOES BIOCHEMICAL MEAN?
    11·2 answers
  • As a worker in this field you would:
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!