AIPMT 2002 | Properties of Matter Question 77 | Physics

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

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

AIPMT 2002

MCQ (Single Correct Answer)

-1

Unit of Stefan's constant is

watt m² K⁴

watt m²/K⁴

watt/m² K

watt/m²K⁴

AIPMT 2001

MCQ (Single Correct Answer)

-1

A cylindrical rod having temperature T₁ and T₂ at its end. The rate of flow of heat Q₁ cal/sec. If all the linear dimension are doubled keeping temperature constant, then rate of flow of heat Q₂ will be

4Q₁

2Q₁

$${{{Q_1}} \over 4}$$

$${{{Q_1}} \over 2}$$

AIPMT 2000

MCQ (Single Correct Answer)

-1

A black body has maximum wavelength $$\lambda $$_m at 2000 K. Its corresponding wavelength at 3000 K will be

$${3 \over 2}{\lambda _m}$$

$${2 \over 3}{\lambda _m}$$

$${{16} \over {81}}{\lambda _m}$$

$${{81} \over {16}}{\lambda _m}$$

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