(English Medium) ICSE Class 10 - CISCE Question Bank Solutions for Physics

Explain the use of radioactive in the field of medicine, agriculture and industry.

What are the uses of radioactive isotopes in following?
(a) Medical field,
(b) Agriculture,
(c) Industries?

A radioactive nucleus `""_"Z"^"A"` X first emits a beta particle and then an alpha particle to give the resulting nucleus `""_"Q"^"P"` Y  What will be the values of P and Q in terms of A and Z?

A nucleus of an element X which has the symbol `""_84^202` X emits an alpha particle and then a beta particle. The final nucleus is `""_"b"^"a"` Y Find a and b.

In an experiment of finding the refractive index of glass, if blue light is replaced by the red light, how will the refractive index of glass change? Give reason in support of your answer.

Which colour of light travels fastest in any medium except air?

Light of a single colour is passed through a liquid having a piece of glass suspended in it. On changing the temperature of liquid, at a particular temperature, the glass piece is not seen.

Why is the light of a single colour used ?

Draw a ray diagram showing the lateral displacement of a ray of light when it passes through a parallel sided glass slab.

A ray of light strikes the surface at a rectangular glass slab such that the angle of incidence is 45^o.

In each case, draw diagram to show the path taken by the ray as it passes through the glass slab and emerges from it.

Using the curve, how do you infer that for given prism, the angle of minimum deviation δ_min is unique for the given light?

How does the deviation produced by a prism depend on the refraction index of its material.

How does the deviation produced by a prism depend on the wavelength of incident light?

The critical angle for glass-air interface is :

A total reflecting equilateral prism can be used to deviate a ray of light through:

Give reason why the smoke from fire looks white.

It is dangerous to connect the switch in the neutral wire. Explain your answer.

A switch must be connected in the ______.

What is nucleus of an atom? Compare its size with that of the atom. Name its constitutents. How is the number of these constituents determined by the atomic number its atomic model.

Name two radioactive substances.

A radioactive substance is oxidized. What changes would you expect to take place in the nature of radioactivity? Explain your answer.