Sail E0 Webinar

MCQs

Electromagnetic Induction, Alternating Current And Voltage

Total Questions : 385 | Page 33 of 39 pages
Question 321. Which of the following is unit of inductance?
  1.    Hennry
  2.    Ampere turns
  3.    Ohm
  4.    Weber/metre
 Discuss Question
Answer: Option A. -> Hennry
Question 322. A crack in the magnetic path of an inductor will result in
  1.    Unchanged inductance
  2.    Increased inductance
  3.    Zero inductance
  4.    Reduced inductance
 Discuss Question
Answer: Option D. -> Reduced inductance
Question 323. The inductance of a coil will increase under all the following conditions except
  1.    When more area for each turn is provided
  2.    When more length for the same number of turns is provided
  3.    When the number of turns of the coil increase
  4.    When permeability of the core increases
 Discuss Question
Answer: Option B. -> When more length for the same number of turns is provided
Question 324. Lenz's law is a consequence of the law of conservation of
  1.    Charge
  2.    Energy
  3.    Induced current
  4.    Induced e.m.f.
 Discuss Question
Answer: Option B. -> Energy
Question 325. As per Faraday's laws of electromagnetic induction, an e.m.f. is induced in a conductor whenever it
  1.    Moves parallel to the direction of the magnetic field
  2.    Cuts magnetic flux
  3.    Lies in a magnetic field
  4.    Lies perpendicular to the magnetic flux
 Discuss Question
Answer: Option B. -> Cuts magnetic flux
Question 326. Air-core coils are practically free from
  1.    Eddy current losses
  2.    Hysteresis losses
  3.    Both Hysteresis losses & Eddy current losses
  4.    None of the listed here
 Discuss Question
Answer: Option C. -> Both Hysteresis losses & Eddy current losses
Question 327. An average voltage of 10 V is induced in a 250 turns solenoid as a result of a change in flux which occurs in 0.5 second. The total flux change is
  1.    0.2 wb
  2.    0.02 wb
  3.    20 wb
  4.    2 wb
 Discuss Question
Answer: Option B. -> 0.02 wb
Question 328. A laminated iron core has reduced eddy-current losses because
  1.    The laminations are stacked vertically
  2.    More wire can be used with less D.C. resistance in coil
  3.    The laminations are insulated from each other
  4.    The magnetic flux is concentrated in the air gap of the core
 Discuss Question
Answer: Option C. -> The laminations are insulated from each other
Question 329. The law that the induced e.m.f. and current always oppose the cause producing them is due to
  1.    Faraday
  2.    Lenz
  3.    Newton
  4.    Coulomb
 Discuss Question
Answer: Option B. -> Lenz
Question 330. The magnitude of the induced e.m.f. in a conductor depends on the
  1.    Amount of flux cut
  2.    Amount of flux linkages
  3.    Rate of change of flux-linkages
  4.    Flux density of the magnetic field
 Discuss Question
Answer: Option C. -> Rate of change of flux-linkages

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

DSP Combined 1 Free Revision Test SAIL JO E-0
GPOE / GPA Combined 1 Free Revision Test SAIL JO E-0
BSP Plant Specific Review Test SAIL JO E-0
BSL Combined 1 Free Revision Test SAIL JO E-0
GFM Combined 1 Free Revision Test SAIL JO E-0