IIT-JEE Exam

Two spherical bodies A (radius 6 cm) and B (radius 18 cm) are at temperatures T1 and T2, respectively. The
maximum intensity in the emission spectrum of A is at 500 nm and in that of B is at 1500 nm. Considering
them to be black bodies, what will be the ratio of total energy radiated by A to that of B ?

Read Solution (Total 0)

IIT-JEE Other Question

A 0.1 kg mass is suspended form a wire of negligible mass. The length of the wire is 1 m and its cross–
sectional area is 4.9 × 10–7 m2. If the mass is pulled a little in the vertically downward direction and
released, it performs simple harmonic motion of angular frequency 140 rad s–1. If the Young's modulus of
the material of the wire is n × 109 Nm–2, the value of n is Gravitational acceleration on the surface of a planet is 6 g
11
, where g is the gravitational acceleration on
the surface of the earth. The average mass density of the planet is 2
3
times that of the earth. If the escape
speed on the surface of the earth is taken to be 11 kms–1, the escape speed on the surface of the planet in
kms–1 will be