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Current Electricity Quiz-4

Dear Readers,

As per analysis for previous years, it has been observed that students preparing for NEET find Physics out of all the sections to be complex to handle and the majority of them are not able to comprehend the reason behind it. This problem arises especially because these aspirants appearing for the examination are more inclined to have a keen interest in Biology due to their medical background. 


Furthermore, sections such as Physics are dominantly based on theories, laws, numerical in comparison to a section of Biology which is more of fact-based, life sciences, and includes substantial explanations. By using the table given below, you easily and directly access to the topics and respective links of MCQs. Moreover, to make learning smooth and efficient, all the questions come with their supportive solutions to make utilization of time even more productive. Students will be covered for all their studies as the topics are available from basics to even the most advanced. 



Q31. A battery consists of a variable number 'n' of identical cells having internal resistances connected in series. The terminals of battery are short circuited and the current i is measured. Which of the graph below slows the relationship between i and n
  •  

  •  

  •  

  •  

Solution
Short circuited current i=nE/nr=E/r 
 i.e. i doesn’t depend upon

Q32.Which of the following circuits is correct for verification of Ohm’s law?
  •  

  •  

  •  

  •  None of these
Solution
                        



Q33.  The reading of the ideal voltmeter in the adjoining diagram will be
  •   4 V
  •  8 V
  •  12 V
  •  14 V
Solution
                                


Q34. Masses of the three wires of same material are in the ratio of 1:2:3 and their lengths in the ratio of 3:2:1. Electrical resistance of these wires will be in the ratio of
  •  1:1:1
  •  1:2:3
  •  9:4:1
  •  27:6:1
Solution
                                     



Q35.Five equal resistances each of resistance R are connected as shown in the figure. A battery of V volts is connected between A and B. The current flowing in AFCEB will be
  •  3V/R
  •  V/R
  •  V/2R
  •  2V/R
Solution
                           



Q36. Two conductors of the same material have their diameters in the ratio 1 : 2 and their lengths in the ratio 2 : 1. If the temperature difference between their ends is the same, then the ratio of amounts of heat conducted per second through them will be
  •  4 : 1
  • 1 : 4
  •  8 : 1
  •  1 : 8
Solution
                          



Q37.The emf of a generator is 6 V and internal resistance is 0.5 kΩ. The reading of a voltmeter having an internal resistance of 2.5 kΩ is
  •  10-3 V
  •  10 V
  •  5 V
  •  0.5 V
Solution
                              



Q38.A railway compartment is lit up by thirteen lamps each taking 2.1 A at 15 V. The heat generated per second in each lamp will be
  •  4.35 cal
  •  5.73 cal
  •  7.5 cal
  •  2.5 cal
Solution
                                  



Q39.Potential gradient is defined as
  •  Fall of potential per unit length of the wire
  •  Fall of potential per unit area of the wire
  •  Fall of potential between two ends of the wire
  •  Potential at any one end of the wire
Solution
Potential gradient=(Potential difference)/Length

Q40. The resistance across R and Q in the figure. 
                        

  •  r/3
  •  r/2
  •  2r
  • 6r
Solution
                                   


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