The sensation of sound persists in our brain for:
0.1 sec
0.01 sec
1 sec
10 sec
In medical field, C.R.O is used to display:
Heart beats
Pictures of organs
Pictures of bones
Blood pressure
LDR can act as:
Diode
Switch
Transistor
Rectifier
The index of refraction depends on:
The focal length
The speed of light
The image distance
The object distance
The distance between principal focus and pole of mirror is called:
Principal focus
Focal length
Aperture
Image
The mirror whose inner surface is reflecting is called:
Concave mirror
Convex mirror
Mirror
Lens
The speed of sound in a liquid is …………..than that in gases:
Ten times
Fifteen times
Five times
Two times
