Units and Measu...

The physical quantity which has the dimensional formula $$\displaystyle \left[ { M }^{ }{ T }^{ -3 } \right] $$ is:

When a wave traverses a medium the displacement of a particle located at x at a time is given by y = a sin (bt - cx), where a, band are constants of the wave, which of the following is a quantity with dimensions?

Ampere-hour is the unit of

If accuracy of weighing machine is better than 1/2 percent, a student record his own mass. Choose the option that explains the recording most accurately.

If energy (E) , force (F) and linear momentum (P) are fundamental quantities, then match the following and give correct answer.

What is the dimensional formula of Inductance?

If $$x=at+b{ t }^{ 2 }$$ where $$x$$ is measured in $$m$$ and $$t$$ in $$s$$, then the dimension of $$\left( { b }/{ a } \right) $$ is:

The given rectangular shaped object pictured is being measured. Its left end is perfectly lined up with "0 m" on the measuring tape. Which of the following is the best and most precise length of the green, rectangular shaped object that can be obtained, using the measuring tape?

The dimensions of $$\displaystyle \frac { a }{ b } $$ in the equation $$\displaystyle P=\frac { a-{ t }^{ 2 } }{ bx } $$ where $$P$$ is pressure, $$x$$ is distance and $$t$$ is time, are:

 Students A, B and C measure the diameter of a wire using three different screw gauges of least count  0.01 cm, 0.05 cm and 0.001 cm respectively. Each one makes 10 measurements.The measurements will be more precise for