Home
Class 12
PHYSICS
A body cools in a surrounding which is a...

A body cools in a surrounding which is at constant temperature of `theta_(0)`. Assume that it obeys Newton's law of colling. Its temperature `theta` is plotted against time `t`. Tangents are drawn to the curve at the points `P(theta=theta_(t))` and `Q(theta=theta_(2))`. These tangents meet the time axis at angles of `phi_(2)` and `phi_(1)`, as shown

A

` (tanphi)/(tan phi)=(theta_(1)-theta_(0))/(theta_(2)-theta_(0))`

B

` (tanphi)/(tan phi)=(theta_(2)-theta_(0))/(theta_(1)-theta_(0))`

C

` (tanphi)/(tan phi)=(theta_(1))/(theta_(2))`

D

` (tanphi)/(tan phi)=(theta_(2))/(theta_(1))`

Text Solution

Verified by Experts

Promotional Banner

Topper's Solved these Questions

  • EXPERIMENTAL PHYSICS

    D MUKHERJEE|Exercise chose the correct|4 Videos

  • IIT QUESTIONS 1

    D MUKHERJEE|Exercise Matrix-Matching Type|1 Videos

Similar Questions

Explore conceptually related problems

A body cools in a surrounding which is at a constant temperature of theta_(0) Assume that it obeys Newton's law of cooling Its temperature theta is plotted against time t Tangents are drawn to the curve at the points P (theta =theta_(1)) and Q(theta =theta_(2)) These tangents meet the time axis at angle of phi_(2) and phi_(1) as shown .

A body obeying Newton's law of cooling cools in a surrounding which is at a constant temperature Its temperature theta is plotted against time There are two points on the curve with temperatures theta_(2) and theta_(1)(theta_(2) gttheta_(1)) such that tangents on these points make angles of 2phi and half of its with time axis respectively Find the temperature of the surrounding .

A body with an initial temperature theta_(1) is allowed to cool in a surrounding which is at a constant temperature of theta_(0) (theta lt theta_(1)) Assume that Newton's law of cooling is obeyed Let k = constant The temperature of the body after time t is best experssed by .

In Newton's law of cooling experiment, we plot a graph of ((d theta)/(dt)) against the temperature difference (theta-theta_(0)) . The graph is

The angle made by the tangent to the curve x=a(theta + sin theta cos theta),y=a(1+ sin theta)^(2) wutg X-axis is

The equation of tangent to the curve x=a(theta+ sin theta), y=a (1+ cos theta)" at "theta=(pi)/(2) is

The tangents to the curve x=a(theta - sin theta), y=a(1+cos theta) at the points theta = (2k+1)pi, k in Z are parallel to :

Two tangents are drawn from the point (-2,-1) to the parabola y^(2)=4x .If theta is the angle between these tangents,then the value of tan theta is

D MUKHERJEE-HEAT AND THERMODYNAMICS-All Questions
  1. A system undergoes a cyclic process in which it absorbs Q(1) heat and ...

    Text Solution

    |

  2. Heat is supplied to a certain homogeneous sample of matter, at a unifo...

    Text Solution

    |

  3. Three rods of the same dimension have thermal conductivities 3K, 2K an...

    Text Solution

    |

  4. Five rods of same dimensions are arranged as shown in the figure. They...

    Text Solution

    |

  5. Three rods A,B and C have the same dimensions Their conductivities are...

    Text Solution

    |

  6. Three rods A,B and C have the same dimensions Their conductivities are...

    Text Solution

    |

  7. One end of a uniform rod of length 10m is placed in boiling water whil...

    Text Solution

    |

  8. A and B are two points on uniform metal ring whose centre is O The ang...

    Text Solution

    |

  9. In a 10 m deep lake, the bottom is at a constant temperature of 4^(@)C...

    Text Solution

    |

  10. A point source of heat of power P is placed at the centre of a spheric...

    Text Solution

    |

  11. A spherical black body of radius r radiates power P, and its rate of c...

    Text Solution

    |

  12. The temperature of an spherical isolated black body falls from T(1) an...

    Text Solution

    |

  13. A planet is at an average distance d from the sun and its average surf...

    Text Solution

    |

  14. The solar constant for a planet is S. The surface temperature of the ...

    Text Solution

    |

  15. The power radiated by a black body is P, and it radiates maximum energ...

    Text Solution

    |

  16. Two bodies A and B have thermal emissivities of 0.01 and 0.81 respecti...

    Text Solution

    |

  17. A black body is at a temperature of 2880 K. The energy of radiation em...

    Text Solution

    |

  18. A body with an initial temperature theta(1) is allowed to cool in a su...

    Text Solution

    |

  19. A system S receives heat continuously from an electric heater of power...

    Text Solution

    |

  20. A body cools in a surrounding which is at constant temperature of thet...

    Text Solution

    |