Comment on the experimental set up.

Will the mercury level fluctuate (go up/down) if phenyl mercuric acetate is sprayed on leaves?

Comment on the experimental set up. What will happen to the level of water if a blower is placed close to set up.

The following circuit diagram shows the experimental set up for the study of dependence of current on potential differnce. Which two circuit components are connected in series?

A water tank has steps inside it. A monkey is sitting on the topmost step(i.e., the first step). The water level is at the ninth step. If the number of steps moved down is represented by negative integers and the number of steps moved up by positive integers, represent his moves in part (i) and (ii) by completing the following, (a) -3+2 -..= -8 (b) 4-2+...= 8. In (a) the sum (-8) represents going down by eight steps. So, what will the sum 8 in (b) represent?

A water tank has steps inside it . A monkey is sitting on the top most step (i.e . The first step).The water level is at the ninth step . If the number of steps moved down is represented by negative integers and the number of steps moved up by positive integers , represents his moves in part (i) and (ii) by completing the following (a) -3+2-.....=-8 (b) 4-2+.....=8 . In (a) the sum (-8) represents going down by eight steps .So what will the sum 8 in (b) represent?

In many experimental set-ups, the source and screen are fixed at a distance say D and the lens is movable.Show that there are two positions for the lens,for which an image is formed on the sceen.Find the distance between these points and the ratio of the image sizes for these two points.