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Aadarsh

  • 3 years ago

I have a question. Please see the attachment and answer with explanation.

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  1. Aadarsh
    • 3 years ago
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  2. Aadarsh
    • 3 years ago
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    Question number 41

  3. Aadarsh
    • 3 years ago
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    Question Number 30

  4. Preetha
    • 3 years ago
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    Hi Aadarsh, tell me what relationships have you learnt that would help you solve this?

  5. Preetha
    • 3 years ago
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    And what do you know about parallel circuits and series?

  6. Aadarsh
    • 3 years ago
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    In series connection, resistors are joined end to end. Current remains same. Effective resistance is greater than highest individual resistance.

  7. Aadarsh
    • 3 years ago
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    In parallel, just the opposite.

  8. shaan_iitk
    • 3 years ago
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    30 B option is correct... this is assuming all batteries have equal EMF..

  9. Aadarsh
    • 3 years ago
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    Question Number 49 also

  10. Preetha
    • 3 years ago
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    Shaan, can you lead Aadarsh through the answer?

  11. Preetha
    • 3 years ago
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    He will not be able to answer the next Q till he understands your logic.

  12. Aadarsh
    • 3 years ago
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    For question 30, can't D be the answer?

  13. shaan_iitk
    • 3 years ago
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    Non ..circuit D provides EMF of V while circuit A provides EMF of 3V ...

  14. shaan_iitk
    • 3 years ago
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    circuit B *

  15. Aadarsh
    • 3 years ago
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    But How?

  16. Aadarsh
    • 3 years ago
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    The other questions?

  17. shaan_iitk
    • 3 years ago
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    okk see I will go one by one.. 1) cannot be correct because circuit A provides more EMF assuming resistance to be the same we bulb would glow brighter in A. 2) is correct because the circuit load is distributed among the batteries and also the net power consumption by bulb in circuit B is lesser than A 3) is incorrect because yet again the circuit load is distributed in B and power consumption is less in B 4) is incorrect because of reasons already given

  18. Aadarsh
    • 3 years ago
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    Thanks a lot. Now please look at the other questions(41 and 49).

  19. Preetha
    • 3 years ago
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    Aadars, why don't you start working on it here. Shan will help, but yo should get started. How else will you get it during the test?

  20. Aadarsh
    • 3 years ago
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    Okay maaam. I am trying my best.

  21. Preetha
    • 3 years ago
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    Shaan, good work. Thanks for working through this. How is life at IITk?

  22. Aadarsh
    • 3 years ago
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    I think question number 41 - "A" is correct, and for question 49, "A" is correct. Not sure.

  23. shaan_iitk
    • 3 years ago
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    Lenz's law does not violate principle of energy hence the assertion is wrong for 41) ... for 41 D is the correct answer..

  24. shaan_iitk
    • 3 years ago
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    Hi preetha .. I am presently in IIMA ..I passed out of IITK

  25. Aadarsh
    • 3 years ago
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    Ooooooo. Okay okay. Got it. 49?

  26. Preetha
    • 3 years ago
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    Great. Thats the fast track to fame and fortune. You should write that in your profile.

  27. Aadarsh
    • 3 years ago
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    1) http://openstudy.com/study#/updates/4f256451e4b0a2a9c266e5ab

  28. Aadarsh
    • 3 years ago
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    2) http://openstudy.com/study#/updates/4f256099e4b0a2a9c266e43f

  29. shaan_iitk
    • 3 years ago
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    do you know why lenz's law is in tune with conservation of energy? think it has a very simple solution .. think logically.. hint is that induced EMF is such that it OPPOSES the change in flux..

  30. Aadarsh
    • 3 years ago
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    I have read the above statement. But completely forgot about the first assumption.

  31. Aadarsh
    • 3 years ago
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    question number 49? Is "A" correct?

  32. shaan_iitk
    • 3 years ago
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    I can't see 49

  33. Aadarsh
    • 3 years ago
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    Okay, did u see the other 2 links?

  34. Aadarsh
    • 3 years ago
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    Question Numebr 49

  35. shaan_iitk
    • 3 years ago
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    Google this .. I dunno about this question ... but pupil expands when there is dim light (to get more light ) .. somewhat like aperture of a camera but I am not sure whether it contracts when trying to see a distant object...

  36. Aadarsh
    • 3 years ago
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    Okay Then. Wat about ur opinion about the other 2 links?

  37. Preetha
    • 3 years ago
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    I think it is A. The pupil restricts the amount of light entering the eye. When you go from dark to light, it responds to protect the eye from an overload to the system

  38. Aadarsh
    • 3 years ago
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    Yeah, for the same analogy, I too wrote "A". Are u sure? Please see the links numbered 1 and 2.

  39. Aadarsh
    • 3 years ago
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    Plzzzzzzzzzzzzzzzzzzzzzzzzzzz do see the links and help.

  40. Preetha
    • 3 years ago
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    I answered your yellow light question. Where are these questions from? What level are you? School? College?

  41. Aadarsh
    • 3 years ago
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    I am in school, grade 10, CBSE from INDIA. THese questions are from NSTSE Stage 2.

  42. Aadarsh
    • 3 years ago
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    Atmosphere question?

  43. Aadarsh
    • 3 years ago
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    I got it. the option for the yellow question is "D". See this link: http://www.scribd.com/sadiq_noori/d/76372104-Quiz-Questions-and-Answers-Current-Affairs-Quiz-Questions-7

  44. Aadarsh
    • 3 years ago
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    Atmosphere question? Plzzzzzzzzz reply.

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