Q. A metal ball immersed in water weighs at and at . The coefficient of cubical expansion of metal is less than that of water. Then :

Thermal Properties of Matter Report Error

A

B

C

D

Data is insufficient

Solution:

The apparent weight of a body submerted in a liquid is given as where is the density of liquid and is the density of solid body. On increasing temperature water expands more than metal hence density of water decreases more so option (B) is correct.

Questions from Thermal Properties of Matter

1. If the temperature difference on the two sides of a wall increases from to , its thermal conductivity

Rajasthan PMT 2007

2. A wall is made of equally thick layers and of different materials. Thermal conductivity of is twice that of . In the steady state, the temperature difference across the wall is . The temperature difference across the layer is

3. The radiation emitted by a star is times that of the sun. If the surface temperatures of the sun and the star are and respectively. The ratio of the radii of the star and the sun is

NTA Abhyas 2020

4. A black body at emits maximum energy corresponding to a wavelength of microns. The temperature of the moon for which micron would be

NTA Abhyas 2020

5. Three rods made from the same material and having the same cross-sectional area, form the sides of an isosceles triangle , right-angled at . The points and are maintained at temperature and , respectively. In steady-state, the temperature of the point is . Assuming that only heat conduction takes place along the lengths of the rods, the value of is

NTA Abhyas 2020

Physics Most Viewed Questions

1. If and respectively denote energy and gravitational constant, then has the dimensions of:

NEET 2021 Physical World, Units and Measurements

2. The de Broglie wavelength of an electron moving with kinetic energy of is nearly

NEET 2020 Dual Nature of Radiation and Matter

3. A car starts from rest and accelerates at At , a ball is dropped out of a window by a person sitting in the car. What is the velocity and acceleration of the ball at ? (Take

NEET 2021 Motion in a Straight Line

4. A wheel with metallic spokes each long is rotated with a speed of in a plane perpendicular to a magnetic field of . The induced emf between the axle and rim of the wheel will be,

NEET 2020 Electromagnetic Induction

5. A barometer is constructed using a liquid (density What would be the height of the liquid column, when a mercury barometer reads ?
(density of mercury

NEET 2020 Mechanical Properties of Fluids

Latest Updates