Question
A radioactive substance emits
|
(a) a-rays |
(b) b-rays |
(c) g-rays |
(d) All of these |
✓
Answer
(d) All of these
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
In Bohr’s model of hydrogen atom, which of the following pairs of quantities are quantized
| (a) Energy and linear momentum | (b) Linear and angular momentum |
| (c) Energy and angular momentum | (d) None of the above |
The fraction f of radioactive material that has decayed in time t, varies with time t. The correct variation is given by the curve
|
(a) A |
(b) B |
(c) C |
(d) D |
Number of spectral lines in hydrogen atom is:
A person suffering from myopia cannot see clearly :
A proton beam is going from north to south and an electron beam is going from south to north. Neglecting the earth's magnetic field, the electron beam will be deflected
Two light beams superimposed each other constructively this results in:
Meteors are
|
(a) Small stars |
|
(b) Burnt pieces of comets that fall on earth |
|
(c) Comets without tails |
|
(d) None of these |
In the Geiger-Marsden scattering experiment, is case of head-on collision the impact parameter should be:
On passing 96500 coulomb of charge through a solution 
the amount of copper liberated is
|
(a) 64 gm |
(b) 32 gm |
(c) 32 kg |
(d) 64 kg |
X-rays are produced by accelerating electrons by voltage V and let they strike a metal of atomic number Z. The highest frequency of X-rays produced is proportional to
|
(a) V |
(b) Z |
(c) (Z – 1) |
(d) |
