Question

Three forces acting on a body as shown. To have resultant force only along y-direction, the magnitude of the minimum additional force needed is

Answer 1

F required ={-x component of the resultant force}
ˉ
F
required =−[−i+
1
2

i]
=
1
2

i
=0.5N
Hence b is the correct answer.


answered Jul 15, 2013 by meena.p
edited Feb 10, 2014 by meena.p

Answer 2

Answer:

The operating prinThe operating principle is that – caused by the photoelectric effect – photons striking a photocathode at the entrance window of a PMT produce electrons, which are then accelerated by a high-voltage field and multiplied in number within a chain of dynodes by the process of secondary emission.ciple is that – caused by the photoelectric effect – photons striking a photocathode at the entrance window of a PMT produce electrons, which are then accelerated by a high-voltage field and multiplied in number within a chain of dynodes by the process of secondary emission.

Explanation: