A bob of heavy mass \(m\) is suspended by a light string of length \(l\). The bob is given a horizontal velocity \(v_0\) as shown in figure. If the string gets slack at some point P making an angle \( \theta \) from the horizontal, the ratio of the speed \(v\) of the bob at point P to its initial speed \(v_0\) is :
A full wave rectifier circuit with diodes (\(D_1\)) and (\(D_2\)) is shown in the figure. If input supply voltage \(V_{in} = 220 \sin(100 \pi t)\) volt, then at \(t = 15\) msec:
Active transport is a type of cellular transport in which molecules (such as glucose, ions, and amino acids) are transferred across a biological membrane to a place where there are already enough of them. As a result, molecules are moved across concentration gradients using chemical energy (for instance, ATP). Root hair cells and the small intestine wall are persistent active transport sites (villi).
There are two types of active transportation mechanisms such as;