List of top Physics Questions on Units and measurement asked in JCECE

A physical quantity X is represented by $ X=[{{M}^{\eta }}{{L}^{-\theta }}{{T}^{-\text{o }\!\!|\!\!\text{ }}}]. $ The maximum percentage errors in the measurement of M, L and T, respectively are $ \alpha %,\beta % $ and $ \gamma %. $ The maximum percentage error in the measurement of X will be

The dimension of $ \frac{P}{a} $ in the equation $ p=\frac{b-{{t}^{2}}}{ax} $ where p is pressure, $ x $ is distance and t is time are

The magnetic moment has dimensions of

The radius of sphere is measured to be $ (2.1\,\pm \,0.5)\,cm. $ Calculate its surface area with error limits: