BP-Units and Measurements -Qn & ans

Units & Measurements-Qn & ans 1.The unit of thermal conductivity is.      (NEET 2019) (a) $ Wm^{{}^-1}K^{{}^-1}$ (b) $Jm;K^{-1}$ (c) $WmK^{-1}$ (d) $Jm^{{}^-1}K^{{}^-1}$ Ans:-  $K=frac{Qx}{A(T_1-T_2)ast t}$ where Q is the amount of heat flow, x is the thickness of the slab, A is the area of cross- section, and t is the time taken. $K=frac{Jm}{m^2;Ks}=Wfrac1mfrac1K=Wm^{-1}K^{-1}\$ 2.The […]