1. Which of the following substances has the lowest electrical resistivity at room temperature?                                                              (Madhya Pradesh, Stage-I, 2012-13)

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3. An electric lamp whose resistance is 10 ohm, and a conductor of 2 ohm resistance are connected in series with a 6 V battery. The total current through the circuit and the potential difference across the electric lamp are

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4. Relation between mass of body and its weight is (NTSE, Madhya Pradesh, Stage-I, 2014-15)

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5. Unit of pressure in S.I. system is (NTSE, Chhattisgarh, Stage-I, 2014-15

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