7th Class Science Related to Competitive Exam Question Bank Work and energy

  • question_answer
    Chemical energy is converted into electrical energy by

    A) battery

    B) washing machine

    C) fen                              

    D) Refrigerator

    Correct Answer: A

    Solution :

        Battery consisting of cells-cell contains two terminals a positive and a negative terminal and electrolytes which allow ions to move between these terminals that cause current.          


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