Question

When a current i flows through a conductor of resistance R, the power P consumed is given by P = i2R. If the current is measured as (3.50 + 0.05) mA and R = (34.5 + 2%), Find the percentage uncertainty in P.

Answer 1

Answer:

$Solution :</p><p></p><p>\bf{\red{\underline{\bf{Given\::}}}}Given:</p><p></p><p>The length,breadth and height of a room are 5m,4m and 3m respectively.The celling at the rate of Rs.7.50/m².</p><p></p><p>\bf{\red{\underline{\bf{To\:find\::}}}}Tofind:</p><p></p><p>The cost of the white washing the walls of the room.</p><p></p><p>\bf{\red{\underline{\bf{Explanation\::}}}}Explanation:</p><p></p><p>We know that formula of the surface area of the 4 walls and celling of the room;</p><p></p><p></p><p>We have;</p><p></p><p>Length of a room = 5m</p><p></p><p>Breadth of a room = 4m</p><p></p><p>Height of a room = 3m</p><p></p><p>A/q</p><p></p><p>\begin{lgathered}\longrightarrow\sf{2[5+4]\times 3+5\times 4}\\\\\longrightarrow\sf{2[9]\times 3+20}\\\\\longrightarrow\sf{18\times 3+20}\\\\\longrightarrow\sf{54+20}\\\\\longrightarrow\sf{\pink{74m^{2} }}\end{lgathered}⟶2[5+4]×3+5×4⟶2[9]×3+20⟶18×3+20⟶54+20⟶74m2</p><p></p><p>Now;</p><p></p><p>\begin{lgathered}\longrightarrow\sf{1m^{2} =Rs.7.50}\\\\\longrightarrow\sf{74m^{2} =Rs.(7.50\times 74)}\\\\\longrightarrow\sf{\orange{Cost\:of\:white\:washing\:of\:the\:room=Rs.555}}\end{lgathered}⟶1m2=Rs.7.50⟶74m2=Rs.(7.50×74)⟶Costofwhitewashingoftheroom=Rs.555</p><p></p><p>$

Answer 2

Explanation:

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