Question

Match List – I with List-II.

List – I	List-II
(a) Source of microwave frequency	(i) Radioactive decay of the nucleus
(b) Source of infrared frequency	(ii) Magnetron
(c) Source of Gamma Rays	(iii) Inner shell electrons
(d) Source of X - rays	(iv) Vibration of atoms and molecules
-	(v) LASER
-	(vi) RC circuit

A. (a) - (ii), (b) - (iv), (c) – (i), (d) – (iii)
B. (a) - (vi), (b) - (iv), (c) – (i), (d) – (v)
C. (a) - (ii), (b) - (iv), (c) – (vi), (d) – (iii)
D. (a) - (vi), (b) - (v), (c) – (i), (d) – (iv)

Answer 1

Hint: In the match the pair, an option in List – I can be matched with either one or with multiple options in List – II, but from the options given, for one option in List – I, there is only one solution in List II. A source is something from which a specific thing or several things are produced.

Complete step by step solution:
For the given list, we will define each of the options in List – I and choose the appropriate option from List – II.

1) Microwave frequency – When microwaves are in effect, they are the energy bursts that are generated by an electronic device known as a magnetron. So, option (a) should be matched with option (ii).

2) Infrared frequency – Infrared frequency is generally produced by molecules and hot bodies. For a hot body, its atoms and molecules should have a strong vibration. So, option (b) should be matched with option (iv).

3) Gamma Rays – Gamma rays are only produced when there are nuclear reactions or strong radioactive materials nearby. So, option (c) should be matched with option (i).

4) X - rays – A filament, an external high voltage supply, electron optics, and an anode encased in an evacuated glass envelope are common components of X-ray sources. The main source of all these components is inner shell electrons. So, option (d) should be matched with option (iii).

So, option A, (a) - (ii), (b) - (iv), (c) – (i), (d) – (iii) is the required solution.

Note: We can see that an option (a) is matched with option (ii), so either A or C is the correct option, and in both the option (b) is matched with (iv) and option (d) is matched with option (iii). So, we can also check the options by only finding answers from options (a) and (c) instead of checking every option.