A long straight wire carrying current of 25 A rests on a table as shown in figure. Another wire PQ of length 1 m, mass 2.5 g carries the same current but in the opposite direction. The wire PQ is free to slide up and down. To what height will PQ rise?
This is a Short Answer Type Questions as classified in NCERT Exemplar
Explanation- magnetic field produced by a long straight current carrying wire is
B= = , for h height distance
Magnetic force on small conductor is F= ilBsin = ilB
Also force, F =mg = l
h= = 51 10-4cm
<p>This is a Short Answer Type Questions as classified in NCERT Exemplar</p><p><strong>Explanation- </strong>magnetic field produced by a long straight current carrying wire is</p><p>B= <math><mfrac><mrow><mrow><msub><mrow><mrow><mi>μ</mi></mrow></mrow><mrow><mrow><mn>0</mn></mrow></mrow></msub><mi>I</mi></mrow></mrow><mrow><mrow><mn>2</mn><mi>π</mi><mi>r</mi></mrow></mrow></mfrac></math> = <math><mfrac><mrow><mrow><msub><mrow><mrow><mi>μ</mi></mrow></mrow><mrow><mrow><mn>0</mn></mrow></mrow></msub><mi>I</mi></mrow></mrow><mrow><mrow><mn>2</mn><mi>π</mi><mi>h</mi></mrow></mrow></mfrac><mi></mi></math> , for h height distance</p><p>Magnetic force on small conductor is F= ilBsin <math><mi>θ</mi></math> = ilB</p><p>Also force, F =mg = <math><mfrac><mrow><mrow><msub><mrow><mrow><mi>μ</mi></mrow></mrow><mrow><mrow><mn>0</mn></mrow></mrow></msub><msup><mrow><mrow><mi>I</mi></mrow></mrow><mrow><mrow><mn>2</mn></mrow></mrow></msup></mrow></mrow><mrow><mrow><mn>2</mn><mi>π</mi><mi>r</mi></mrow></mrow></mfrac></math> l</p><p>h= <math><mfrac><mrow><mrow><mn>4</mn><mi>π</mi><mo>×</mo><msup><mrow><mrow><mn>10</mn></mrow></mrow><mrow><mrow><mo>-</mo><mn>7</mn></mrow></mrow></msup><mo>×</mo><mn>25</mn><mo>×</mo><mn>25</mn><mo>×</mo><mn>1</mn></mrow></mrow><mrow><mrow><mn>2</mn><mi>π</mi><mo>×</mo><mn>2.5</mn><mo>×</mo><msup><mrow><mrow><mn>10</mn></mrow></mrow><mrow><mrow><mo>-</mo><mn>3</mn><mi></mi></mrow></mrow></msup><mo>×</mo><mn>9.8</mn></mrow></mrow></mfrac></math> = 51 <math><mo>×</mo></math> 10<sup>-4</sup>cm</p>
There are two types of electricity - static and current. The current electricity is divided into Alternating Current (AC) and Direct Current (DC). Based on the production methods, electricity is divided into - heat, chemical, pressure, light and magnetism.
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