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CBSE Class 12-science Answered

the couple acting on a magnet of length 10 cm pllaced in a uniform magnetic field of intensity 40 N/wb such that the axis of the magnet makes 45 with the field direcion is underroot 2 /10 Nm ,the pole strength of the manet in webers is ?
Asked by Atulcaald | 31 May, 2018, 09:46: PM
answered-by-expert Expert Answer
 
Torque τ = m × B = m × B × sin45,  where m is pole strength and B is magnetic field 
 
begin mathsize 12px style m space equals space fraction numerator tau cross times square root of 2 over denominator B end fraction space equals space fraction numerator begin display style fraction numerator square root of 2 over denominator 10 end fraction end style cross times square root of 2 over denominator 40 end fraction space equals space 2 over 400 equals 0.5 cross times 10 to the power of negative 2 end exponent space W b space m end style
Answered by Thiyagarajan K | 11 Jun, 2018, 12:13: PM

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