Page 1 - Home Assignment
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SAI INTERNTIONAL SCHOOL
                                                        Class 8
                                                Home Assignment
                                                 Subject- Physics
                                        Ch- Some Natural Phenomena
                                               Subtopic- Lightning



                   INSTRUCTIONS:
                         Please solve or paste the worksheet in the Physics Copy.
                         For Assertion& Reason question follow the following directions.
                          DIRECTION: Each of these questions contains an Assertion followed by Reason.
                          Read them carefully and answer the question on the basis of following options.
                          You have to select the one that best describes the two statements.
                          (a) If both Assertion and Reason are correct and Reason is the correct explanation of
                          Assertion.
                          (b) If both Assertion and Reason are correct, but Reason is not the correct explanation
                          of Assertion.
                          (c) If Assertion is correct but Reason is incorrect.
                          (d) If Assertion is incorrect but Reason is correct.
                          (e) If Assertion & Reason both are incorrect.
                       1.    Assertion: Lightning is electric discharge in large scale                             1
                            Reason: positive and negative charges interact and releases energy
                       2.    Assertion: Lightning conductors should be installed at the top of the building.       1
                            Reason: To enhance the look of the building.
                   Fill in the blanks
                       3.    During lightning ______ place is safe.                                                1

                       4.    If in open field sit in______ position.                                               1
                       5.     There are two types of lightning _______ &________                                   1
                   MCQ
                       6.    Lightning conductors are made of                                                      1
                            a)  Good insulators
                            b)  Good conductors of electricity
                            c)  Poor conductors of heat
                            d)  Poor conductors of electricity
                       7.    Which is not an protection from lightning when indoors?                               1
                            a)  We  should  not  use  electrical  appliance  during  lightning.  They  should  be
                                 unplugged.
                            b)  We can use wired telephones/Phones
                            c)  Avoid contact with water from the pipes because it may conduct electricity.
                            d)  Do not touch wire fences

                       8.    What is a lightning conductor?During the construction of a building, the              3
                            lightning conductor was left hanging in the air by mistake. Would the lightning
                            conductor still be effective? Explain
                       9.    What is electric discharge?If air and cloud were good conductors of electricity,      3
                            do you think lightning could occur? Explain.
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