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 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
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
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
Work function of a metal is the:
a.Energy required by an electron to get absorbed in the metal surface.
b.Minimum energy required by an electron to escape from the metal surface.
c.Energy required by an electron to be retained in the metal surface.
d.Maximum energy required by an electron to escape from the metal surface.