Introductory Circuit Analysis (13th Edition)
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN: 9780133923605
Author: Robert L. Boylestad
Publisher: PEARSON
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Textbook Question
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Chapter 11, Problem 1P

For the electromagnet in Fig. 11.75:

a. Find the flux density in Wb/m2.

b. What is the flux density in teslas?

c. What is the applied magnetmotive force?

d. What would the reading of the meter in Fig. 11.14 read in gauss?

Chapter 11, Problem 1P, For the electromagnet in Fig. 11.75: a. Find the flux density in Wb/m2. b. What is the flux density

Fig. 11.75

Expert Solution
Check Mark
To determine

(a)

The value of flux density.

Answer to Problem 1P

The value of flux density is 0.04Wbm2.

Explanation of Solution

Concept used:

Write the expression for magnetic flux density:

  B=ϕA   ............(1)

Here, B is magnetic flux density, ϕ is the flux and A is the area.

Calculation:

Substitute 4×104Wb for ϕ and 0.01m2 for A in equation (1).

  B=4× 10 4Wb0.01m2=0.04Wbm2

Conclusion:

Thus,value of flux density is 0.04Wbm2.

Expert Solution
Check Mark
To determine

(b)

The flux density in tesla.

Answer to Problem 1P

The value of flux density in tesla is 0.04T.

Explanation of Solution

Concept used:

  1T=1Wbm2

Calculation:

The value of flux density B is 0.04Wbm2.

  B=0.04Wbm2( 1T 1 Wb m 2 )=0.04T

Conclusion:

Thus, value of flux density in tesla is 0.04T.

Expert Solution
Check Mark
To determine

(c)

The value of applied magnetomotive force.

Answer to Problem 1P

The value of applied magnetomotive force is 88At.

Explanation of Solution

Concept used:

Write the expression for magnetomotive force.

  F=NI   ............(2)

Here, F is magnetomotive force, N is number of turns and I is value of current.

Calculation:

Substitute 40 for N and 2.2A for I in equation (2).

  F=40(2.2A)=88At

Conclusion:

Thus,value of applied magnetomotive force is 88At.

Expert Solution
Check Mark
To determine

(d)

The value of flux density in gauss.

Answer to Problem 1P

The value of flux density in gauss is 400gauss.

Explanation of Solution

Concept used:

  1T=104gauss

Calculation:

The value of flux density B in tesla is 0.04T.

  B=0.04T( 1gauss 10 4 T)=400gauss

Conclusion:

Thus, the value of flux density in gauss is 400gauss.

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Chapter 11 Solutions

Introductory Circuit Analysis (13th Edition)

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