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
The frequency (in Hz) of a note that is one octave higher than 500 Hz is
375
750
1000
2000
If an object is at rest, then the time (X-axis) versus distance (Y-axis) graph
is vertical
is horizontal
has 45o positive slope
has 45o negative slope
The photocell is a device to:
store photons
convert photon energy into mechanical energy
measure light intensity
store electrical energy for replacing storage batteries
Match List-I and List-II and select the correct answer given below the lists:
1-b 2-c 3-d 4-a
1-a 2-b 3-c 4-d
1-c 2-d 3-a 4-b
With reference to the focal length, which of the following statement (s) is / and correct?
1. The power of a lens is its capacity to deviate a ray. It is measured as the reciprocal of the focal length in meters, i.e. P=1/f
2. The power of the convex lens is negative.
3. The power of the concave lens is negative.
only 1 and 2
only 1 and 3
only 2 and 3
all 1,2 and 3
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