Advertisements
Advertisements
प्रश्न
The dimensions of emissive power are ______.
विकल्प
[M1 L-2 T-3]
[M1 L2 T-3]
[M1 L0 T-3]
[M1 L0 T-2]
Advertisements
उत्तर
The dimensions of emissive power are [M1 L-2 T-3].
APPEARS IN
संबंधित प्रश्न
A metal sphere cools at the rate of 4°C / min. when its temperature is 50°C. Find its rate of cooling at 45°C if the temperature of surroundings is 25°C.
Two copper spheres of radii 6 cm and 12 cm respectively are suspended in an evacuated enclosure. Each of them are at a temperature 15°C above the surroundings. The ratio of their rate of loss of heat is.................
- 2:1
- 1:4
- 1:8
- 8:1
A pinhole is made in a hollow sphere of radius 5 cm whose inner wall is at temperature 727oC. Find the power radiated per unit area. [Stefan’s constant σ = 5.7 x 10-8 J/m2 s K4 , emissivity (e) = 0.2]
The susceptibility of magnesium at 300K is 1.2 x 10-5. At what temperature will the susceptibility increase to 1.8 X 10-5?
The kinetic energy per molecule of a gs at temperature T is ________.
(a) `(3/2)RT`
(b) `(3/2)K_BT`
(c) `(2/3) RT`
(d) `(3/2)("RT"/M)`
Does the temperature of a body depend on the frame from which it is observed?
Which of the curves in the following figure represents the relation between Celsius and Fahrenheit temperatures?

Which of the following pairs may give equal numerical values of the temperature of a body?
If the temperature of a uniform rod is slightly increased by ∆t, its moment of inertia I about a line parallel to itself will increase by
The temperature of water at the surface of a deep lake is 2°C. The temperature expected at the bottom is
An aluminium sphere is dipped into water at 10°C. If the temperature is increased, the force of buoyancy
As the temperature is increased, the time period of a pendulum
When a solid melts or a liquid boils, the temperature does not increase even when heat is supplied. Where does the energy go?
Water equivalent of a body is measured in ___________ .
Which of the following pairs of physical quantities may be represented in the same unit?
The mechanical equivalent of heat ____________ .
The heat capacity of a body depends on
(a) the heat given
(b) the temperature raised
(c) the mass of the body
(d) the material of the body
A concrete slab has a length of 10 m on a winter night when the temperature is 0°C. Find the length of the slab on a summer day when the temperature is 35°C. The coefficient of linear expansion of concrete is 1.0 × 10–5 °C–1.
The volume of a glass vessel is 1000 cc at 20°C. What volume of mercury should be poured into it at this temperature so that the volume of the remaining space does not change with temperature? Coefficients of cubical expansion of mercury and glass are 1.8 × 10–6 °C–1 and 9.0 × 10–6 °C–1 , respectively.
A steel rod of length 1 m rests on a smooth horizontal base. If it is heated from 0°C to 100°C, what is the longitudinal strain developed?
A steel ball that is initially at a pressure of 1.0 × 105 Pa is heated from 20°C to 120°C, keeping its volume constant.
Find the pressure inside the ball. Coefficient of linear expansion of steel = 12 × 10–6 °C–1and bulk modulus of steel = 1.6 × 1011 Nm–2.
Define one mole.
Explain the meaning of heat and work with suitable examples.
Heat given to a body that raises its temperature by 1°C is ______.
Near the melting point of a solid, the heat supplied does NOT raise the temperature. Instead, what does it do?
What is the approximate interatomic spacing in gases at NTP (Normal Temperature and Pressure)?
