AIPMT 2012 Mains | Properties of Matter Question 59 | 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

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 47 English Option 1

AIPMT 2012 Prelims Physics - Properties of Matter Question 47 English Option 2

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 2010 Prelims

MCQ (Single Correct Answer)

-1

Assuming the sun to have a spherical outer surface of radius r, radiating like a black body at temperature t^oC, the power received by a unit surface, (normal to the incident rays) at a distance R from the centre of the sun is
where $$\sigma $$ is the Stefan's constant.

$${{{r^2}\sigma {{\left( {t + 273} \right)}^4}} \over {4\pi {R^2}}}$$

$${{16{\pi ^2}{r^2}\sigma {t^4}} \over {{R^2}}}$$

$${{{r^2}\sigma {{\left( {t + 273} \right)}^4}} \over {{R^2}}}$$

$${{4\pi {r^2}\sigma {t^4}} \over {{R^2}}}$$

PREVIOUS NEXT

NEET Subjects

Biology

Botany

Zoology

Human Health and Diseases Body Fluids and Its Circulation Locomotion and Movement Neural Control and Coordination Reproduction in Organisms Reproductive Health Structural Organisation in Animals Digestion and Absorption Excretory Products and Their Elimination Chemical Coordination and Integration Human Reproduction Animal Kingdom Breathing and Exchange of Gases Evolution