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PHYSICS MCQs

Total Questions : 3767 | Page 41 of 377 pages
Question 401. When number of turns in a coil is trippled, without any change in the length of coil, its self inductance becomes?
  1.    Nine times
  2.    Three times
  3.    Six times
  4.    One–third
 Discuss Question
Answer: Option A. -> Nine times
Question 402. A current carrying conductor is associated with
  1.    A magnetic field
  2.    An electric field
  3.    An electro-magnetic field
  4.    An electrostatic field
 Discuss Question
Answer: Option C. -> An electro-magnetic field
Question 403. In order to make an electromagnet you need a
  1.    Dry cell batteries
  2.    Thin coated copper wire
  3.    Iron nail
  4.    All of the above
 Discuss Question
Answer: Option D. -> All of the above
Question 404. Fleming's right hand rule is used to find the direction of the
  1.    Alternate current
  2.    Direct current
  3.    Induced current
  4.    Actual current
 Discuss Question
Answer: Option C. -> Induced current
Question 405. Which of the following is not a part of a CRT ?
  1.    Phosphor screen
  2.    Shadow mask
  3.    Electron gun
  4.    Gas plasma
 Discuss Question
Answer: Option D. -> Gas plasma
Question 406. Slip rings are usually made of
  1.    Aluminium
  2.    Copper
  3.    Phosphor Bronze
  4.    Carbon
 Discuss Question
Answer: Option C. -> Phosphor Bronze
Question 407. The safest hammers are those with heads that are
  1.    Cast steel and chiseled
  2.    Alloy and drop-forged steel
  3.    Welded and alloyed
  4.    Chiseled and drop forged
 Discuss Question
Answer: Option B. -> Alloy and drop-forged steel
Question 408. The function of ball bearings in a wheel is :
  1.    To increase friction
  2.    To convert kinetic friction into rolling friction
  3.    To convert static friction into kinetic friction
  4.    Just for convenience
 Discuss Question
Answer: Option A. -> To increase friction
Question 409. Gear finishing operation is called
  1.    Burnishing
  2.    Hobbing
  3.    Shaping
  4.    Milling
 Discuss Question
Answer: Option A. -> Burnishing
Question 410. A wheel-barrow is an example of
  1.    Class III lever
  2.    Pulley system
  3.    Class I lever
  4.    Class II lever
 Discuss Question
Answer: Option D. -> Class II lever

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