Indian army has published the notification for SSC Tech 56 men and SSC Tech 27 women for the course commencing at OTA Chennai from April 2021
When a photon hits a piece of silicon, one of three things can happen:
1) The photon can pass straight through the silicon — this (generally) happens for lower energy photons.
2) The photon can reflect off the surface.
3) The photon can be absorbed by the silicon if the photon energy is higher than the silicon band gap value. This generates an electron-hole pair and sometimes heat depending on the band structure.
Which of the atatements given above is/are correct?
1 and 3 only
2 and 3 only
3 only
1,2 and 3
Match the followings:
List - I
A) Electric conductance
B) Magnetic flux
C) Capacitance
D) Amount of heat
List -II
1) Joule
2) Siemens
3) Weber
4) Farad
A - B - C - D
A1 B4 C3 D2
A2 B3 C4 D1
A1 B3 C4 D2
A2 B1 C3 D4
Jarrah and barri types of wood is used in?
as fuel
making showpiece
railway sleepers
pencil
Fuse wire is made up of, except?
aluminum
gold
silver
copper
The hearing range of human ear is
20 Hz to 20,000 Hz
Less than20 Hz
More than 20,000 Hz
20 Hz to 25,000 Hz
