Ask a Doubt
Request a call back

Join NOW to get access to exclusive study material for best results

CBSE Class 12-science Answered

The magnetic field at two points on the axis of a circular coil at distance 0.05m and 0.2m from the centre are in the ratio 8:1.find the radius of the coil?
Asked by rahularun2000 | 19 Jun, 2015, 07:05: PM
answered-by-expert Expert Answer
begin mathsize 14px style straight B equals fraction numerator straight mu subscript 0 Ir squared over denominator 2 left parenthesis straight r squared plus straight x squared right parenthesis to the power of 3 divided by 2 end exponent end fraction Given colon straight B subscript 1 over straight B subscript 2 equals fraction numerator left parenthesis straight r squared plus straight x subscript 2 squared right parenthesis to the power of 3 divided by 2 end exponent over denominator left parenthesis straight r squared plus straight x subscript 1 squared right parenthesis to the power of 3 divided by 2 end exponent end fraction open parentheses 8 over 1 close parentheses squared equals fraction numerator left parenthesis straight r squared plus straight x subscript 2 squared right parenthesis cubed over denominator left parenthesis straight r squared plus straight x subscript 1 squared right parenthesis cubed end fraction 4 left parenthesis straight r squared plus straight x subscript 1 squared right parenthesis equals straight r squared plus straight x subscript 2 squared 4 straight r squared plus 4 straight x subscript 1 squared equals straight r squared plus straight x subscript 2 squared 3 straight r squared equals straight x subscript 2 squared minus 4 straight x subscript 1 squared 3 straight r squared equals left parenthesis 0.2 cross times 0.2 right parenthesis minus 4 left parenthesis 0.05 cross times 0.05 right parenthesis 3 straight r squared equals 0.04 minus 4 left parenthesis 0.0025 right parenthesis 3 straight r squared equals 0.04 minus 0.01 3 straight r squared equals 0.03 straight r squared equals fraction numerator 0.03 over denominator 3 end fraction equals 0.01 straight r equals 0.1 space straight m end style
 
The radius of the coil is 0.1 m.
Answered by Faiza Lambe | 19 Jun, 2015, 08:52: PM

Concept Videos

Multiple Choice Questions Practice Test
Answered Unanswered My Questions My Answers
CBSE 12-science - Physics
An electron moves in a circular orbit of radius 0.51A around a nucleus at a frequency of 6.8times10^(15)Hz .Estimate the magnetic field at the nucleus
Asked by bogarpradnya | 03 Mar, 2020, 08:42: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 12-science - Physics
how are the magnetic field lines different from the electrostatic field lines.
Asked by 101206077443105 | 02 Sep, 2018, 08:56: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 12-science - Physics
Why cyclotron can not be used to accelerate neutron?
Asked by Topperlearning User | 08 May, 2015, 10:30: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 12-science - Physics
Why cyclotron is not suitable for accelerating electrons?
Asked by Topperlearning User | 08 May, 2015, 10:31: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 12-science - Physics
Write any two uses of cyclotron.
Asked by Topperlearning User | 08 May, 2015, 10:32: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 12-science - Physics
Why the set up of cyclotron is placed in an evacuated chamber?
Asked by Topperlearning User | 08 May, 2015, 10:32: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 12-science - Physics
An electron beam was deflected in a given field which was perpendicular to the beam. The beam follows a parabolic path after deflection. Give answer whether the field was electric field or magnetic field.
Asked by Topperlearning User | 08 May, 2015, 10:33: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 12-science - Physics
What will be the force on a charged particle moving in a region where uniform electric as well as magnetic field are acting?
Asked by Topperlearning User | 18 May, 2015, 11:11: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 12-science - Physics
What do you mean by cyclotron frequency?
Asked by Topperlearning User | 08 May, 2015, 10:39: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 12-science - Physics
Derive an expression for maximum energy gained by the positive ion using a cyclotron.
Asked by Topperlearning User | 08 May, 2015, 10:46: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
My Class Videos Tests ₹ Plans Ask a Doubt
Get Latest Study Material for Academic year 24-25 Click here
×