For the following questions answer them individually
The resistance of a wire is āRā ohm. If it is melted and stretched to ānā times its original length, its new resistance will be
A physical quantity of the dimensions of length that can be formed out of c, G and $$\frac{e^2}{4 \pi \epsilon_0}$$ is [c is velocity of light, G is universal constant of gravitation and e is charge]
Radioactive material 'A' has decay constant $$'8 \lambda'$$ and material 'B' has decay constant $$'\lambda'$$. Initially they have same number of nuclei. After what time, the ratio of number of nuclei of material 'B' to that 'A' will be $$\frac{1}{e}$$ ?
A potentiometer is an accurate and versatile device to make electrical measurements of E.M.F, because the method involves :
The ratio of resolving powers of an optical microscope for two wavelengths $$\lambda_1 = 4000 Ć $$ and $$\lambda_2 = 6000 Ć $$ is
Which of the following cell organelles is responsible for extracting energy from carbohydrates to form ATP?