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PHYSICS MCQs

Total Questions : 3767 | Page 47 of 377 pages
Question 461. Which of the following is preferred for accelerating electrons?
  1.    Betatron
  2.    Cyclotron
  3.    Synchrotron
  4.    Van de Graft Generator
 Discuss Question
Answer: Option A. -> Betatron
Question 462. Why does'nt the hydrogen atom emit X-rays?
  1.    It is very small in size
  2.    It has only one electron
  3.    Its energy levels are very close to each other
  4.    It is highly electropositive
 Discuss Question
Answer: Option C. -> Its energy levels are very close to each other
Question 463. What is a neuron ?
  1.    Basic unit of energy
  2.    Particle released during radioactivity
  3.    The anti-particle of neutron
  4.    Basic unit of nervous system
 Discuss Question
Answer: Option D. -> Basic unit of nervous system
Question 464. Which electromagnetic radiation is used for satellite communication ?
  1.    Ultraviolet
  2.    Infrared
  3.    Radiowave
  4.    Millimeter wave
 Discuss Question
Answer: Option C. -> Radiowave
Question 465. Sending a frame to a group of stations is known as
  1.    Single casting
  2.    Spreading
  3.    Multicasting
  4.    Casting
 Discuss Question
Answer: Option C. -> Multicasting
Question 466. What is the full form of ''AM' regarding radio broadcasting?
  1.    Amplitude Movement
  2.    Anywhere Movement
  3.    Amplitude Matching
  4.    Amplitude Modulation
 Discuss Question
Answer: Option D. -> Amplitude Modulation
Question 467. Radio waves sent out by a radio stations are reflected by
  1.    Troposphere
  2.    Stratosphere
  3.    Mesosphere
  4.    Ionosphere
 Discuss Question
Answer: Option D. -> Ionosphere
Question 468. Bandwidth is the
  1.    A measure of the width of a range of frequencies
  2.    The rate of data transfer
  3.    Both a & b
  4.    None of the above
 Discuss Question
Answer: Option C. -> Both a & b
Question 469. Negative feedback in amplifiers
  1.    Increases bandwidth and decreases noise
  2.    Decreases bandwidth and decreases noise
  3.    Increases bandwidth and increases noise
  4.    Decreases bandwidth and increases noise
 Discuss Question
Answer: Option A. -> Increases bandwidth and decreases noise
Question 470. The sharpness of a television image is termed as its
  1.    Clarity
  2.    Colour
  3.    Resolution
  4.    Graphics
 Discuss Question
Answer: Option C. -> Resolution

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