Std 8 Science Chapter-4

16 Questions | Total Attempts: 138

SettingsSettingsSettings
Please wait...
Std 8 Science Chapter-4

.


Questions and Answers
  • 1. 
    The rate of flow of an electric charge is known as
    • A. 

      Electric potential

    • B. 

      Electric current

    • C. 

      None of these

    • D. 

      Option 4

  • 2. 
    The SI unit of electric  current is
    • A. 

      Ohm

    • B. 

      Volt

    • C. 

      Ampere

    • D. 

      Options

  • 3. 
    Water in the waterfall flows from higher level to the lower level because of------
    • A. 

      Gravitational attraction

    • B. 

       potential differences

    • C. 

      None of these

    • D. 

      Option 4

    • E. 

      Option 5

  • 4. 
    In an electric circuit electrons flow from a point of------ potential
    • A. 

      Lower

    • B. 

      Higher

    • C. 

      Very low

    • D. 

      Option 4

  • 5. 
    The differences between the electrostatic potentials of the positive end and the negative ends of an electric cell is the------ of cell
    • A. 

      Unit potential differences

    • B. 

      Potential differences

    • C. 

      None of these

    • D. 

      Option 4

    • E. 

      Option 5

  • 6. 
    Tree electric cell of potential differences 1.5 v each have been connected as a battery the potential differences of the battery will be -------v
    • A. 

      6.5V

    • B. 

      7.5V

    • C. 

      4.5V

    • D. 

      Option 4

  • 7. 
    An electric current flowing in a wire creates -----around the wire
    • A. 

      Magnetism

    • B. 

      Copper

    • C. 

      Lithium

    • D. 

      Option 4

  • 8. 
    The SI unit of force is-----
    • A. 

      Dyne

    • B. 

      Newton

    • C. 

      Joule

    • D. 

      Option 4

  • 9. 
    ------ are used in our  radiosets Wall clocks and torches
    • A. 

      Dry cell

    • B. 

      Electric cell

    • C. 

      Lead acid cell

    • D. 

      Option 4

  • 10. 
    ------Cell are used in cars trucks motorcycles
    • A. 

      Ni- cd cell

    • B. 

      Electric cell

    • C. 

      Lead acid cell

    • D. 

      Option 4

  • 11. 
    Water or a liquid flows from a higher level to a lower level
    • A. 

      True

    • B. 

      False

  • 12. 
    When lightning strikes the ground from cloud a large current does not flows
    • A. 

      True

    • B. 

      False

  • 13. 
    The dry cell are used in our radio sets
    • A. 

      True

    • B. 

      False

  • 14. 
    Lead acid cell are used in clock and torches
    • A. 

      True

    • B. 

      False

  • 15. 
    The system of coil and the screw is called an electromagnet
    • A. 

      True

    • B. 

      False

Back to Top Back to top