Physics - Current Electricity

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

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Option : C
Explanation :

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

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Option : A
Explanation :

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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 (NTSE Panchkula, Chandigarh, Stage-I, 2012-13)

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Option : B
Explanation :

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4. If the temperature is increased, what will be the effect on the resistance of a conductor (NTSE Panchkula, Chandigarh, Stage-I, 2012-13)

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Option : C
Explanation :

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5. In the given circuit voltmeter shows a reading of 4 V, then the power developed across R resistance will be

(NTSE Delhi, Stage-I, 2012-13)

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Option : C
Explanation :

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