AIPMT 2003 | Properties of Matter Question 73 | Physics

AIPMT 2003

MCQ (Single Correct Answer)

-1

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 is

$${2 \over 3}K$$

$$\sqrt 2 K$$

3 K

$${4 \over 3}K$$

AIPMT 2002

MCQ (Single Correct Answer)

-1

The Wien's displacement law express relation between

wavelength corresponding to maximum energy and temperature

radiation energy and wavelength

temperature and wavelength

colour of light and temperature.

AIPMT 2002

MCQ (Single Correct Answer)

-1

Which of the following is best close to an ideal black body?

black lamp

cavity maintained at constant temperature

platinium black

a lump of charcoal heated to high temperature.

AIPMT 2002

MCQ (Single Correct Answer)

-1

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, then

K₁A₁ = K₂A₂

$${{{K_1}{A_1}} \over {{S_1}}} = {{{K_2}{A_2}} \over {{S_2}}}$$

K₂A₁ = K₁A₂

$${{{K_2}{A_1}} \over {{S_2}}} = {{{K_1}{A_2}} \over {{S_1}}}$$

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