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    Question

    Match the following machines with their working

    principles: (i) Electric motor -  (a) Heat energy into mechanical energy (ii) Steam engine -  (b) Electric energy to light energy (iii) Dynamo -           (c) Electrical energy to mechanical energy (iv)Electric Bulb -     (d) Mechanical energy into electrical energy
    A (i-d, ii-a, iii-c, iv-b) Correct Answer Incorrect Answer
    B (i-c, ii-d, iii-a, iv-b) Correct Answer Incorrect Answer
    C (i-c, ii-a, iii-d, iv-b) Correct Answer Incorrect Answer
    D (i-b, ii-d, iii-a, iv-c) Correct Answer Incorrect Answer

    Solution

    Electric motor: Converts electrical energy to mechanical energy.  Steam engine: Converts heat energy into mechanical energy.  Dynamo: Converts mechanical energy into electrical energy.  Electric bulb: Converts electrical energy into light energy.

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