The contraction of muscle of shortest duration is seen in

The value of $\lim_{n \rightarrow \infty} \frac{1}{n^3} \sum_{k=1}^n (k^2 x)$ is

Which of the following statements about the Bohr model of the hydrogen atom is false?

$DNA$ fingerprinting refers to

In an $NPN$ transistor,$10^{10}$ electrons enter the emitter region in $10^{-6} \, s$. If $2\%$ of electrons are lost in the base region,then the collector current and the current amplification factor $(\beta)$ are,respectively:

From the figure describing the photoelectric effect,we may infer correctly that: