IIT-JEE Exam

The activity of a freshly prepared radioactive sample is 10^10 disintegrations per second, whose mean life is
10^9 s. The mass of an atom of this radioisotope is 10^-25 kg. The mass (in mg) of the radioactive sample is

Read Solution (Total 0)

IIT-JEE Other Question

long circular tube of length 10 m and radius 0.3 m carries a current I along its
curved surface..A wire-loop of resistance 0.005 ohm and of radius 0.1 m is
placed inside the tube with its axis coinciding with the axis of the tube. The current
varies as I = I0cos(300 t) where I0 is constant. If the magnetic moment of the loop is
Nm0I0sin(300 t), then ‘N’ is The freezing point (in oC) of a solution containing 0.1 g of K3[Fe(CN)6 (Mol. Wt. 329) in 100 g of water
(Kf = 1.86 K kg mol-1) is