Question

Assertion  : The surface wave propagation is used for medium wave band and for television broadcasting.

Reason     :  The surface waves travel directly from transmitting antenna to receiver antenna through atmosphere.

(a) If both assertion and reason are true and the reason is the correct explanation of the assertion.

(b) If both assertion and reason are true but reason is not the correct explanation of the assertion.

(c) If assertion is true but reason is false.

(d) If the assertion and reason both are false.

Answer

(a) If both assertion and reason are true and the reason is the correct explanation of the assertion.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Similar questions

Positive charge inside $2^{ He ^4}$ atom is __________ .
Which of the following is a wrong description of binding energy of a nucleus?

Two conductors made of the same material are connected across a common potential difference. Conductor A has twice the diameter and twice the length of conductor B. The power delivered to the two conductors  and   respectively is such that   equals to

(a) 0.5

(b) 1.0

(c) 1.5 

(d) 2.0

A single slit of width a is illuminated by violet light of wavelength 400 nm and the width of the diffraction pattern is measured as y. When half of the slit width is covered and illuminated by yellow light of wavelength 600 nm, the width of the diffraction pattern is

(a) The pattern vanishes and the width is zero

(b) y / 3

(c) 3y

(d) None of these

Assertion  :  In Young’s experiment, the fringe width for dark fringes is different from that for white fringes.

Reason      : In Young’s double slit experiment the fringes are performed with a source of white light, then only black and bright fringes are observed.

(a) If both assertion and reason are true and the reason is the correct explanation of the assertion.

(b) If both assertion and reason are true but reason is not the correct explanation of the assertion.

(c) If assertion is true but reason is false.

(d) If the assertion and reason both are false.

The momentum of a photon is 2  gm-cm/sec. Its energy is

(a) 0.61  

(b) 2.0  

(c) 6 

(d) 6  

In hydrogen atom which quantity is integral multiple of  

(a) Angular momentum

(b) Angular velocity

(c) Angular acceleration

(d) Momentum

+q, +2q, +3q, +4q, ……(up to +20q) charges are situated at coordinates (0, 0), (1, 0), (2, 0), ….. (Up to 20). What is the total charge stored in the system?
In the Boolean algebra, the following one is wrong:

Mixed  and  ions (mass of   and that of   beam passes a region of constant perpendicular magnetic field. If kinetic energy of all the ions is same then

(a)  ions will be deflected more than those of  

(b)  ions will be deflected less than those of  

(c) All the ions will be deflected equally

(d) No ions will be deflected