Sail E0 Webinar

General Knowledge > General Science

PHYSICS MCQs

Total Questions : 3767 | Page 49 of 377 pages
Question 481. Waves that are required for long distance wireless communication are
  1.    Infrared rays
  2.    Ultraviolet rays
  3.    Radio waves
  4.    Microwaves
 Discuss Question
Answer: Option C. -> Radio waves
Question 482. A television channel is characterised by
  1.    Frequency of transmitted signal
  2.    Velocity of transmitted signal
  3.    Physical dimension of television screen
  4.    Size of picture tube
 Discuss Question
Answer: Option A. -> Frequency of transmitted signal
Question 483. Positive feedback is used in
  1.    Amplifiers
  2.    Rectifiers
  3.    Oscillators
  4.    None of these
 Discuss Question
Answer: Option C. -> Oscillators
Question 484. What is found in frequency modulation ?
  1.    Fixed frequency
  2.    Fixed dimension
  3.    Change in frequency and dimension
  4.    Change in dimension only
 Discuss Question
Answer: Option A. -> Fixed frequency
Question 485. The waveform of a certain signal can be studied by
  1.    Spectrometer
  2.    Cathode ray oscilloscope
  3.    P – n junction diode
  4.    Sonometer
 Discuss Question
Answer: Option D. -> Sonometer
Question 486. In a optical fibre cable, the signal is propagated along the
  1.    Inner Core
  2.    Cladding
  3.    Both core and cladding
  4.    Surface and cladding
 Discuss Question
Answer: Option A. -> Inner Core
Question 487. The GPS device in an automobile uses which communication channel?
  1.    Satellite
  2.    Microwave
  3.    Radio frequency
  4.    Infrared
 Discuss Question
Answer: Option A. -> Satellite
Question 488. The audio signals of TV are
  1.    Amplitude modulated
  2.    Frequency modulated
  3.    Unmodulated
  4.    Velocity modulated
 Discuss Question
Answer: Option B. -> Frequency modulated
Question 489. In radio-communication, the signals emitted by transmitting antenna are reflected on
  1.    Stratosphere
  2.    Ozonosphere
  3.    Ionosphere
  4.    Troposphere
 Discuss Question
Answer: Option C. -> Ionosphere
Question 490. Rainbow is produced when sunlight fall on drops of rain. Which of the following physical phenomena are responsible for this?
I.Diffusion
II.Refraction
III.Internal reflection
  1.    I, II and III
  2.    I and II
  3.    II and III
  4.    I and III
 Discuss Question
Answer: Option C. -> II and III

Latest Videos
Chapter 1 - GLOBAL STEEL SCENARIO & INDIAN STEEL INDUSTRY Part 1 : (13-04-2024) INDUSTRY AND COMPANY AWARENESS (ICA)
Direction Sense Test Part 1 Reasoning (Hindi)
Chapter 1 - RMHP / OHP / OB & BP Part 1 : (14-02-2024) GPOE
Cube & Cuboid Part 1 Reasoning (Hindi)
Data Interpretation (DI) Basic Concept Reasoning (Hindi)
Counting Figures Part 1 Counting Of Straight Lines Reasoning (Hindi)
Sail E0 free webinar Webinars
Real Numbers Part 7 Class 10 Maths
Real Numbers Part 1 Class 10 Maths
Polynomials Part 1 Class 10 Maths

Latest Test Papers

Chapter 3.1 : Overview of Finance & Accounts Department Chapter 3 : Finance & Accounts SAIL E0 - GFM 2024
Chapter 2.1 : Overview Chapter 2 : Materials Management SAIL E0 - GFM 2024
Chapter 1.1 : Personnel Functions- An overview Chapter 1 : Personnel Management SAIL E0 - GFM 2024
GPOE / GPA Combined 1 Free CBT Mock Test SAIL E0 2024
CBT Mixed Test 1 GPOE/GPA SAIL E0 2024