Units and Measu...

The dimensional formula of electric potential is

Which of the following relation is dimensionally incorrect?

The velocity of a particle (v) at an instant t is given by v =at + bt$$^{2}$$. The dimension of b is the

Dimensional formula of $$\Delta Q$$, heat supplied to the system is

The dimensional formula of physical quantity is $$[M^aL^bT^c]$$. Then that physical quantity is

The displacement of a progressive wave is represented by y = A sin($$\omega$$t - kx) where x is distance and t is time. The dimensions of $$\displaystyle \frac{\omega}{k}$$ are same as those of the

The mean length of an object is 5 cm. Which of the following measurements is most accurate. ?

The physical quantity to be measured more accurately in the experimental determination of Young's modulus of a wire is

The dimensional formula for electric intensity is

Consider two cylindrical rods of identical dimensions, one of rubber and the other of steel. Both the rods are fixed rigidly at one end to the roof. A mass $$M$$ is attached to each of the free ends at the centre of the rods.