modern and space physics, sources of energy - Category wise Question and Answer Practice Test with Solutions

modern and space physics, sources of energy PRACTICE TEST [3 - EXERCISES]

set 1

set 2

set 3

Question : 1

The process of superimposing signal frequency (i.e., audio wave) on the carrier wave is known as

a) Reception

b) Modulation

c) Transmission

d) Detection

Answer: (b)

Question : 2

The service area of space wave communication increases by –

a) Decreasing the height of receiving antenna

b) Increasing the height of both transmitting and receiving antenna

c) Increasing the height of transmitting antenna

d) Decreasing the distance between transmitting and receiving antenna

Answer: (b)

Maximum range of space wave propagation

d = $4/3\text" x 1.23 "[√{H_t}+√{H_r}]$

⇒ d ∝ Ht and d ∝ Hr

∴ d increases if Ht and Hr

i.e. height of transmitting and receiving antenna increases.

Question : 3

In frequency modulation:

a) The frequency of modulated wave varies as amplitude of modulating wave

b) The amplitude of modulated wave varies as amplitude of carrier wave

c) The amplitude of modulated wave varies as frequency of carrier wave

d) The frequency of modulated wave varies as frequency of modulating wave.

Answer: (a)

The process of changing the frequency of a carrier wave (modulated wave) in accordance with the audio frequency signal (modulating wave) is known as frequency modulation (FM).

Question : 4 [CDS]

Light Emitting Diode (LED) converts

a) electrical energy into light energy

b) thermal energy into light energy

c) light energy into electrical energy

d) mechanical energy into electrical energy

Answer: (a)

Question : 5

At absolute zero, Si acts as

a) metal

b) insulator

c) non-metal

d) None of these

Answer: (b)

IMPORTANT general science mcq EXERCISES
general science mcq CATEGORIES
Recent Blogs

Recently Added Subject & Categories For All Competitive Exams

Top 149+ Biology General Knowledge Practice MCQ Test

Top Biology Ecology & Environment Awareness General Knowledge Multiple Choice Questions And Answers. General Science GK Practice Test For Competitive Exams

December-16-2022 by Careericons

Continue Reading »

Important General Science Biology Practice MCQ Questions

Top General Science Biology In Human Welfare Based Multiple Choice Questions And Answers, Practice MCQ Test For All Competitive Exams, NEET, SSC, Interview

December-06-2022 by Careericons

Continue Reading »

Top 199+ General Science Biology Practice Test, MCQ PDF

Most Important General Science Biology Human Welfare Multiple Choice Questions And Answers (MCQ) PDF, Practice Test For All Competitive Exams, SSC, NEET, RRB

December-01-2022 by Careericons

Continue Reading »

New General Science Biology MCQ Online Practice Test, PDF

Top Most General Science Biology Food Production Multiple Choice Questions And Answers (MCQ), Online GK Practice Test, PDF For All Competitive Exams, NEET

November-29-2022 by Careericons

Continue Reading »