A rod AB is 1 m long. The temperature of its one end A is maintained at 100 °C and other end B at 10 °C, the temperature at a distance of 60 cm from point B is 1.  64 °C 2.  36 °C 3.  46 °C 4.  72 °C

Subtopic:  Conduction |
51%
Hints

In designing, a beam for its use to support a lead. The depression at centre is proportional to (where, Yis Young’s modulus)

1.  Y2

A balloon is filled at 27 °C and 1 atm pressure by 500 m3. He, At -3 °C and 0.5 atm pressure, the volume of He will be

1.  700 m3

The particle of mass 50 kg is at rest. The work done to accelerates it by 20 m/s in 10 s is

1.  103 J

The moment of inertia of a circular loop of radius R, at a distance of R/2 around a rotating axis parallel to horizontal diameter of loop is

1.  MR2

The ratio of radius of two bubbles is 2: 1. What is the ratio excess pressure inside them?

1.  1: 2

In the capacitor of capacitance C, charge Q and energy W is stored. If charge is increases upto 2Q, the energy stored will be

1.

The unit of thermal conductivity is

1.  Wm-1K-1

Photon and electron are given same energy (10‑20J). Wavelength associated with photon and electron are λp and λe, the correct statement will be

The half life of radioactive elements is 600 yr the fraction of sample that would remain after 3000 yr is

1.  1/2