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
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
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
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.
A chord attached to a vibrating form divides it into 6 loops, when its tension is 36 N . The tension at which it will vibrate in 4 loops is
a.24 N
b.36 N
c.64 N
d.81 N