Sign in
12thPass logo
New chatPYQ LibraryDoubtsRank report
Sign in to see Recents

Your guest activity stays on this device

Sign in to save progress →
Sign in

Properties of Matter question

2006 · Q164
Guest · filters and generic practice availableBrowsing as a guest · PYQ filters and generic practice are available. Sign in only for personalised features and saved progress.
  1. PYQ Library
  2. /NEET
  3. /Physics
  4. /Properties of Matter
  5. /2006 · Q164

Properties of Matter question

2006 · Q164

NEETPhysicsProperties of MatterMCQ+4 / −1
A black body at 1227oC emits radiations with maximum intensity at a wavelength of 5000 A∘\mathop A\limits^ \circA∘​. If the temperature of the body is increased by 1000oC, the maximum intensity will be observed at
  1. A
    3000 A∘\mathop A\limits^ \circA∘​
  2. B
    4000A∘\mathop A\limits^ \circA∘​
  3. C
    5000A∘\mathop A\limits^ \circA∘​
  4. D
    6000A∘\mathop A\limits^ \circA∘​
View written solutionFree

Correct answer: A

Applying Wein's displacement law,

λmT=contant{\lambda _m}T = contantλm​T=contant

5000A˚×(1227+273)=(2227+273)×λm5000{\bf{{Å}}} \times \left( {1227 + 273} \right) = \left( {2227 + 273} \right) \times {\lambda _m}5000A˚×(1227+273)=(2227+273)×λm​

λm=5000×15001000=3000A˚{\lambda _m} = {{5000 \times 1500} \over {1000}} = 3000Åλm​=10005000×1500​=3000A˚

PreviousNext

More from Properties of Matter

  • Which of the following rods, (given radius r and length l) each made of the same material and whose ends are maintained at the same temperature will conduct most heat ?2005 · MCQ
  • If λm denotes the wavelength at which the radioactive amission from a black body at a temperature TK is maximum, then2004 · MCQ
  • Consider a compound slab consisting of two different materials having equal thicknesses and thermal conductivities K and 2K, respectively. The equivalent thermal conductivity of the slab is2003 · MCQ
  • For a black body at temperature 727oC, its radiating power is 60 watt and temperature of surrounding is 227oC. If temperature of black body is changed to 1227oC then its radiating power will be2002 · MCQ
  • Unit of Stefan's constant is2002 · MCQ
  • Consider two rods of same length and different specific heats (S1, S2), conductivities (K1, K2) and area of cross-sections (A1, A2) and both having temperatures T1 and T2 at their ends. If rate of loss of heat due to conduction is equal,…2002 · MCQ
  • Which of the following is best close to an ideal black body?2002 · MCQ
  • The Wien's displacement law express relation between2002 · MCQ