An object is dropped from the top of a tower. If it takes...
An object is dropped from the top of a tower. If it takes 4s for it to reach the ground, calculate the height of the tower.(g = 10 ms-2, ignore air resistance)
20m
40m
80m
160m
Correct answer is C
H = 12gt2
12×10×42=80
If a reverse-biased voltage is applied across a p-n junction, the depletion layer width is ...
Which of the following materials does not serve as a safety device in electrical circuits? ...
What is the effect of the increase in the size of the hole of a pin-hole camera on the image? it ...
An object 0 lies at a distance m in front of concave mirror of focal length f. If m < f, then the...