Science Physics MCQ-168

General Science-Physics objective Questions for UPPSC, NDA, RBI, UPSC, SSC, CDS, CivilsPrelims, DelhiPolice Exams



Which of the following electromagnetic waves has the longest wavelength ?

 
 
 
 

X-rays were discovered by

 
 
 
 

Penetrating power of X-rays can be increased by

 
 
 
 

Consider the following statement

 
 
 
 

Match List-I (frequency range) with List-II (Uses) and select the correct answer

List – I —List – II

(A) 54 MHz to 890 MHz (i) UHF band
(B) 1710 kHz to 54 MHz (ii) television waves
(C) 88 MHz to 108 MHz (iii) short wave
(D) 300 MHz to 30,00 MHz (iv) FM radio
Code:

A B C D

 
 
 
 

An acoustically good hall should have

 
 
 
 

Doppler effect is independent of

 
 
 
 

A radar beam consists of

 
 
 
 

The waves used for a communication through artificial satellite are

 
 
 
 

The electromagnetic radiation most prevalent in the atmosphere is

 
 
 
 

which of the following sequences are the electro magnetic radiations in decreasing order of wave lengths

 
 
 
 

The,ionosphere is mainly composed of

 
 
 
 

The ozone layer absorbs radiation of wavelengths

 
 
 
 

The ozone layer absorbs

 
 
 
 

The ozone layer in the atmosphere is at a height of about

 
 
 
 

Polarization in electromagnetic wave is caused by

 
 
 
 

The ratio of the speed of X-rays to that of gamma rays

 
 
 
 

When X-rays are produced, then

 
 
 
 

Structure of solids is investigated by using

 
 
 
 

X-rays are steams of

 
 
 
 

The rest mass of a photon is

 
 
 
 

Frequency ranges for microwaves are

 
 
 
 

The polarization of electromagnetic wave is in

 
 
 
 

Ultra violet light of sun’s radiation is prevented from reaching the earth’s atmosphere by the layer of

 
 
 
 

Electromagnetic waves are produced by