Question

Match the List-I with List-II:

	List-I		List-II
A.	Microwaves	I.	Radio active decay of the nucleus
B.	Gamma rays	II.	Rapid acceleration and deceleration of electron in aerials
C.	Radio waves	III.	Inner shell electrons
D.	X-rays	IV.	Klystron valve

Choose the correct answer from the options given below:

• A. A-I, B-II, C-III, D-IV
• B. A-IV, B-I, C-II, D-III
• C. A-I, B-III, C-IV, D-II
• D. A-IV, B-III, C-II, D-I

Answer 1

Answer: (B)

A-IV, B-I, C-II, D-III

Answer 2

• A. Microwaves: Typically generated using devices like Klystron valves. So, A matches with IV.
• B. Gamma rays: These are high-energy photons emitted from the nucleus of an atom during radioactive decay. So, B matches with I.
• C. Radio waves: Produced by the oscillation of electric charges, commonly in an antenna, involving rapid acceleration and deceleration of electrons. So, C matches with II.
• D. X-rays: Produced when high-energy electrons strike a target, causing deceleration (Bremsstrahlung) or by transitions of inner-shell electrons in atoms (characteristic X-rays). So, D matches with III.

Therefore, the correct matching is A-IV, B-I, C-II, D-III.