Stay away from negative people.

A positive charge of 20 mu C is placed 2 m away from a negative charge of 20 mu C . Determine the electric field at a point 2 m away from each charges.

Ramesh, Kailash , Avinash and Jagan are good friends studying in a school. Three of them stay away from the school and one stays nearer to it. Two study in class IV, one m class v and · Th . one in class VI. d Sey study Hmdi, Maths, Social Science and Science . one of these four friends is good at all th f subjects while another is weak in all the subJects. Ramesh stays away from the sch I and is good at Maths only while Kailash is weak in Maths only and stays close to the school. Neither of these two study in class v or VI. One who is good at all the subjects is studying in class V. Avmash is not studying in class VI. Which two boys are good at Mathematics?

To print a photograph from a negative, the time of exposure to light from a lamp placed 0.50m away is 2.5s. How much exposure time is required if the lamp is placed 1.0w away ?