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6 Questions | Total Attempts: 424

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Questions and Answers
  • 1. 
    If a copper wire is stretched to double of its length, then the value of resistance becomes
    • A. 

      ½ times

    • B. 

      4 times

    • C. 

      2 times

    • D. 

      Remains Same

  • 2. 
    Magnetic field lines are always
    • A. 

      Straight lines

    • B. 

      Zigzag lines

    • C. 

      Hyperbola

    • D. 

      Closed loops

  • 3. 
    Lenz’s law is a consequence of the law of conservation of
    • A. 

      Charge

    • B. 

      Mass

    • C. 

      Momentum

    • D. 

      Energy

  • 4. 
    Image formed by plane mirror
    • A. 

      Must be real

    • B. 

      Must be virtual

    • C. 

      May be real or virtual

    • D. 

      Information provided is not enough

  • 5. 
    An ion X2- contains 10 electrons and 8 neutrons. What are the atomic number and mass number of element X?
    • A. 

      10, 18

    • B. 

          8, 16

    • C. 

      10,16

    • D. 

      8,18

  • 6. 
    The pH of carbonated drink is
    • A. 

    • B. 

      >7

    • C. 

      =7

    • D. 

      Approx 7.8

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