Wednesday, 21 September 2022

CURRENT ELECTRICITY : MCQ ON CURRENT ELECTRICITY PART 4

 

Q1 Internal resistance depends on 

  • Nature of electrolyte
  • Nature of electrodes
  • Both a and b
  • None of these

  • Both a and b

 


Q2 To draw maximum current from a combination of cells how should the cells be grouped

  • Series
  • Parallel
  • Mixed
  • Depend upon the relative value of external and internal resistance.

  • Depend upon the relative value of external and internal resistance.


Q3 Two cells of emf 1.25 V and 0.75 V and internal resistance of 2 Ω and 1 Ω respectively are connected in series ,Find the effective E.M.F?

  • 2 V
  • 3 V
  • 5 V
  • 0 V

  • 3 V


Q4 Series combination of n cells is used when high ------------ is required. 

  • voltage
  • current
  • both of these
  • none of these

  • voltage

Q5 Two cells of e.m.f E1 and E2 and internal resistance r1 and r2 are connected in series. Then the e.m.f. is ?

  • E = E1 + E2
  • E = E1 / E2
  • E = E1. E2
  • None of the above

  • E = E1 + E2


Q6 In parallel grouping of cells, we obtain more current.

  • True
  • false

  • True

Q7 When cells are connected incorrectly in series, total internal resistance is also affected.

  • True
  • false


  • false


Q8 Cells can be grouped in __________ different way .

  • 1
  • 3
  • 5
  • 7

  • 3


Q9.  n cells each of emf are connected in series combination .The effective emf of series combination.

  • E/n 
  • E+n 
  • nE

  • nE


Q10 n cells each of emf are connected in parallel combination. The effective emf of parallel combination

  • E/n 
  • E+n 
  • nE 


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