Question

- An iron ring of mean length 100 cm with an air gap of 2 mm has
a winding of 500 turns. The relative permeability of iron is 600.
When a current of 3 A flows in the winding, determine the flux
density. Neglect fringing. Answer
**[0.523 Wb/m**^{2}**]**

Answer #1

.

There might be some calculation/ printing error in the answer you gave. I have checked the calculations multiple times. Please have a check. We can discuss any querries in comments. I will update the answer accordingly.

Please rate a thumbs up if satisfied.

Have a nice time ahead :)

A toroidal core of relative permeability ?? = 3000, has a mean
radius R = 80 mm and a circular cross section with radius b = 25
mm. An airgap ?? = 3 mm exists, and a current I flows in a 500-turn
winding to produce a magnetic flux of 10−5 Wb, as shown in Figure
Q2(a). Neglecting flux leakage and using mean path length,
find:
1. The reluctances of the air gap and the iron core
2. ?? and...

A coil is wound uniformly with 300 turns over a steel ring of
relative permeability 900, having a mean circumference of 40 mm and
cross-sectional area of 50 mm2. If a current of 25 amps
is passed through the coil, find (a) m.m.f. (b) reluctance of the
ring and (c) flux. Ans: [(a) 7500 AT (b) 0.7 x
106 AT/Wb (c) 10.7 mWb]

Suppose we have a core of 2 cm2 cross-sectional area, path
length 10 cm, with μr = 1000 and a
1 mm air gap. We wrap 150 turns of coil and inject 2A of
current. What is the mmf? What are
the reluctances of the core and the gap? What is the magnetic fl
ux? What is the equivalent
permeability?

A 250 mm diameter of cast iron pipe flows 39.3 L/s of
SAE 10 oil along 500 m length. Given: dynamic viscosity, μ and
density, ρ of SAE 10 oil are 1.04 x 10-1 Ns/m2 and 917 kg/m3
respectively. By assuming the flow is laminar, determine energy
head and pressure loss due to pipe friction using Hagen-Poiseuille
equation and friction factor, f.

QUESTION 1
A current of 3t^2 flows through a 100 mH inductor. What is the
emf across the conductor at t=2s?
1.2 V
-1.2 V
-120 V
120 V
QUESTION 2
What is the energy stored in a 50 mH inductor if a 20 A current
is applied?
10 J
0.5 J
5 J
1 J
QUESTION 3
A transformer is made using a primary coil with N=100 turns and
a secondary coil with N=25 turns. What is the voltage...

ADVERTISEMENT

Get Answers For Free

Most questions answered within 1 hours.

ADVERTISEMENT

asked 35 minutes ago

asked 35 minutes ago

asked 35 minutes ago

asked 37 minutes ago

asked 49 minutes ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 2 hours ago

asked 2 hours ago