A rigid spherical body is spinning around an axis without any external torque. Due to change in temperature, the volume increases by 1
a.Will increase approximately by 1
b.Will decrease approximately by 1
c.Will decrease approximately by 0.67
d.Will increase approximately by 0.33
In YDSE, water is filled in the space between the slits and screen. Then
a.fringe pattern shifts upward but fringe width remains unchanged
b.fringe width decreases and fringe pattern shifts upward
c.fringe width remains unchanged and central fringe does not shift
d.fringe width decreases and fringe pattern does not shift
A slightly conical wire of length L and end radii r1 and r2 is stretched by two forces F and F applied parallel to the length in opposite directions and normal to the end faces. If Y denotes Young's modulus, then the extension produced is:
a.FL/pir1 r2Y
b.FLY/pir1 r2
c.FL/pir1 Y
d.FL/pir1^2Y
Photodiode is a device | Physics Questions
a.Which is always operated in reverse bias
b.Which is always operated in forward bias
c.In which photo current is independent of intensity of incident radiation
d.Which may be operated in forward or reverse bias
A leaf which contains only green pigments is illuminated by a laser light of wavelength 0.6328 mu m. It would appear to :
a.black
b.green
c.brown
d.red