Which of the following features is NOT a characteristic o...
Which of the following features is NOT a characteristic of natural radioactivity?
Radioactivity is a nuclear phenomenon
Radioactivity is exhibited only by elements of mass number greater than 206
The radioactivity of an element is affected by electric and magnetic fields in the surroundings
Radioactive substances emits three types of radiations, a-rays, \(\beta\)-rays and y-rays
The radioactive element is transformed into a new element
Correct answer is B
Natural radioactivity is exhibited by elements of atomic numbers of 83 or more
Vapour is said to be saturated on top of an enclosed liquid if _________ ...
water is a poor thermometric liquid because it ...
For a rough inclined plane on which lies a body of weight W, the angle θ in the diagram above ...
Which of the following instruments is best for measuring the diameter of a thin constantan wire? ...
Four cells each of e.m.f 1.5V and internal resistance of 4Ω are connected in parallel. What is...
The total power drawn from the cell in the circuit above is ...
The following devices use plane mirrors in their operations, except ...
A vector quantity can only be completely described when ……… and …………are mentioned....
A ball is swung in a horizontal circle of centre O with a constant speed. acceleration? ...