AIPMT 2012 Mains | Properties of Matter Question 52 | Physics

AIPMT 2012 Mains

MCQ (Single Correct Answer)

-1

A slab of stone of area 0.36 m² and thickness 0.1 m is exposed on the lower surface to steam at 100^oC. A block of ice at 0^oC rests on the upper surface of the slab. In one hour 4.8 kg of ice is melted. The thermal conductivity of slab is
(Given latent heat of fusion of ice = 3.36 $$ \times $$ 10⁵ J kg^$$-$$1)

1.24 J/m/s/^oC

1.29 J/m/s/^oC

2.05 J/m/s/^oC

1.02 J/m/s/^oC

AIPMT 2012 Prelims

MCQ (Single Correct Answer)

-1

If the radius of a star is R and it acts as a black body, what would be the temperature of the star, in which the rate of energy production is Q?

$${Q \over {4\pi {R^2}\sigma }}$$

$${\left( {{Q \over {4\pi {R^2}\sigma }}} \right)^{ - 1/2}}$$

$${\left( {{{4\pi {R^2}Q} \over \sigma }} \right)^{1/4}}$$

$${\left( {{Q \over {4\pi {R^2}\sigma }}} \right)^{1/4}}$$

AIPMT 2012 Prelims

MCQ (Single Correct Answer)

-1

Liquid oxygen at 50 K is heated to 300 K at constant pressure of 1 atm. The rate of heating is constant. Which one of the following graphs represents the variation of temperature with time ?

AIPMT 2012 Prelims Physics - Properties of Matter Question 40 English Option 1

AIPMT 2012 Prelims Physics - Properties of Matter Question 40 English Option 2

AIPMT 2012 Prelims Physics - Properties of Matter Question 40 English Option 3

AIPMT 2012 Prelims Physics - Properties of Matter Question 40 English Option 4

AIPMT 2010 Prelims

MCQ (Single Correct Answer)

-1

A cylindrical metallic rod in thermal contact with two reservoirs of heat at its two ends conducts an amount of heat Q in time t. The metallic rod is melted and the material is formed into a rod of half the radius of the original rod. What is the amount of heat conducted by the new rod, when placed in thermal contact with the two reservoirs in time t?

$${Q \over 4}$$

$${Q \over {16}}$$

$${Q \over 2}$$

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