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Thermal Properties of Matter · Question 45

AIPMT 2002MCQEasy📈 Topic in 0% papers+4−1
1

The Wien's displacement law expresses relation between

  1. wavelength corresponding to maximum energy and temperature
  2. radiation energy and wavelength
  3. temperature and wavelength
  4. colour of light and temperature.

Answer

(1) wavelength corresponding to maximum energy and temperature

Solution

As per NCERT, Wien's displacement law: m T = constant (b = 2.9 10-3 m K)

m is the wavelength at which the energy emitted by a black body is maximum.

The law relates the wavelength corresponding to maximum energy and the temperature.

Answer: (1)

AIPMT 2002

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2

A cylindrical rod has temperatures T1 and T2 at its ends. The rate of flow of heat is Q1 cal/s. If all the linear dimensions are doubled keeping the temperatures constant, then the rate of flow of heat Q2 will be

  1. 4Q1
  2. 2Q1
  3. Q14
  4. Q12
AIPMT 2001
3

Gravitational force is required for

  1. stirring of liquid
  2. convection
  3. conduction
  4. radiation
AIPMT 2000
4

A black body emits maximum energy at wavelength m at 2000 K. Its corresponding wavelength at 3000 K will be

  1. 32 m
  2. 23 m
  3. 1681 m
  4. 8116 m
AIPMT 2000

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