The layers of atmosphere are heated through
  • A
    Convection
  • B
    Conduction
  • C
    Radiation
  • D$(b)$ and $(c)$ both
Easy
art

Download our app
and get started for free

Experience the future of education. Simply download our apps or reach out to us for more information. Let's shape the future of learning together!No signup needed.*

Similar Questions

  • 1
    $Assertion :$ A hollow metallic closed container maintained at a uniform temperature can act as a source of black body radiation.
    $Reason :$ All metals act as black bodies.
    View Solution
  • 2
    A body cools in $7$ minutes from $60^{\circ}\,C$ to $40^{\circ}\,C$. The temperature of the surrounding is $10^{\circ}\,C$. The temperature of the body after the next $7$ minutes will be
    View Solution
  • 3
    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? ( $\sigma$ stands for Stefan's constant.)
    View Solution
  • 4
    A large cylindrical rod of length $L$ is made by joining two identical rods of copper and steel of length $(\frac {L}{2})$ each . The rods are completely insulated from the surroundings. If the free end of copper rod is maintained at $100\,^oC$ and that of steel at $0\,^oC$ then the temperature of junction is........$^oC$ (Thermal conductivity of copper is $9\,times$ that of steel)
    View Solution
  • 5
    Heat is flowing through two cylindrical rods of the same material. The diameters of the rods are in the ratio $1 : 2$ and their lengths are in the ratio $2 : 1$. If the temperature difference between their ends is the same, then the ratio of the amounts of heat conducted through per unit time will be
    View Solution
  • 6
    A black body at $200 K$ is found to exit maximum energy at a wavelength of $14\mu m$. When its temperature is raised to $1000K$ , the wavelength at which maximum energy is emitted is
    View Solution
  • 7
    An insulated container is filled with ice at $0\,^oC$ , and another container is filled with water that is continuously boiling at $100\,^oC$ . In series of experiments, the containers are connected by various thick metal rods that pass through the walls of container as shown in the figure

    In the experiment $I$ : a copper rod is used and all ice melts in $20$ minutes.

    In the experiment $II$ : a steel rod of identical dimensions is used and all ice melts in $80$ minutes.

    In the experiment $III$ : both the rods are used in series and all ice melts in $t_{10}$ minutes.

    In the experiment $IV$ : both rods are used in parallel and all ice melts in $t_{20}$ minutes.

    View Solution
  • 8
    Two conducting rods $A$ and $B$ of same length and cross-sectional area are connected $(i)$ In series $(ii)$ In parallel as shown. In both combination a temperature difference of $100^o C$ is maintained. If thermal conductivity of $A$ is $3K$ and that of $B$ is $K$ then the ratio of heat current flowing in parallel combination to that flowing in series combination is
    View Solution
  • 9
    A beaker full of hot water is kept in a room. If it cools from $80^{\circ} C$ to $75^{\circ} C$ in $t_1$, minutes, from $75^{\circ} C$ to $70^{\circ} C$ in $t_2$ minutes and from $70^{\circ} C$ to $65^{\circ} C$ in $t_3$ minutes, then
    View Solution
  • 10
    Relation between the colour and the temperature of a star is given by
    View Solution