9th Class Science Sound Question Bank Sound Formative Objective Problems

  • question_answer
    The speed of electromagnetic wave is

    A)  \[\text{3}\times \text{1}{{\text{0}}^{8}}\text{cm}/\text{s}\]                    

    B)  \[\text{3}\times \text{1}{{\text{0}}^{8}}\text{m}/\text{s}\]

    C)  340 m/s              

    D)  none of these

    Correct Answer: B

    Solution :

      Not Available


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