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1. Physics Help! A 0.75 m-long solenoid consisting of 1200 turns is used to generate a magnetic field 0.30 T. How?

B = muo x n x i => i = B/muo n where muo = 4pi x 10^-7; n = no. of turns per unit length; B = magnetic field induction i = 0.30/(4pix10^-7x1200/0.75) => i = 149.2A

2 Answers · Science & Mathematics · 03/04/2013

2. Torque exertion on a solenoid coil.?

B at the center of solenoid = muo x n x i = 4pi x 10^-7 x 1400 x 3.4 = 6x10^-3T Torque = BANi = 6x10^-3x1.2x10^-3x56x0.55 = 2.2x10^-4Nm

2 Answers · Science & Mathematics · 18/03/2013

3. electromagnetic waves?

.../m) mu0 - permeability of vacuum (air) = 4*pi*10^-7 H/m B = H*muo - magnetic induction .........(1) R - distance from antenna = 10^5 m r - radius of of...

2 Answers · Science & Mathematics · 17/04/2007

4. what is the magnitude of this current?

Hello Nicole, let us the expression B = (muo / 2 pi) * (I / d) Here B = 1.47*10^-8 T, d = 8.91*10...

1 Answers · Science & Mathematics · 15/10/2012

5. What is the magnitude of the magnetic field at P2 (in T)?

...magnetic field induction at P2 is got by the formula B = (muo/4pi) (i/R) (sin@1+sin@2) muo = 4pi*10^--7 H/m; i = 0.556 A...

1 Answers · Science & Mathematics · 09/12/2009

...would be more intense only along the axis of the solenoid. Its induction B = muo n i. Where muo = 4 pi *10^--7 H/m. n - the number of ...

1 Answers · Science & Mathematics · 30/04/2010

... formula for parallel wires carrying current=(B*2*pi*r)/muo where B=magnitude of magnetic field =280 µT converting to...

1 Answers · Science & Mathematics · 16/04/2015

8. Current needed to generate a magnetic field 1.2cm from a long strait wire?

Use the equation: B=muo I/2piR so I=2piRB/muo

2 Answers · Science & Mathematics · 17/06/2011

9. How much energy due to the Earth's magnetic field is present in 1.5 m3 of space near Earth's surface...

...field of induction intensity B, there is an energy density U = 1/(2*muo) * B^2 muo is the magnetical permitivity of the vacuum If ...

2 Answers · Science & Mathematics · 19/06/2009

10. Phyics Magnetism problem HELP!?

...wire), you can easily use the Ampere's theorem: B*2*Pi*d = muo I1 giving B= muo I1 / (2 Pi d) Then...

4 Answers · Science & Mathematics · 15/08/2012