Physics · Mechanics and Waves

Units and Measurements formulas for JEE

Every Units and Measurements formula you need for JEE, grouped by concept.

4 formulas2 concepts

Errors and Significant Figures

3 formulas

\frac{\Delta x}{x}\times 100

Percentage error in a measurement.

applies whenx is measured value.

unitserror

\frac{\Delta Q}{Q}=a\frac{\Delta x}{x}+b\frac{\Delta y}{y}

Relative error for Q=x^a y^b.

applies whenSmall errors assumed.

unitserror

\frac{\Delta x}{x}

Relative error of a measurement.

applies whenx is measured value.

unitserror

1 formula

[Q]=M^aL^bT^c

Dimensional formula of a quantity.

applies whenM L T are base dimensions.

unitsdimension

Other chapters

Rhovecs schedules these formulas back to you right before you’d forget them — and picks the next concept to practise. We decide, you execute.