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1. Which of the following substances has the lowest electrical resistivity at room temperature? (NTSE Madhya Pradesh, Stage-I, 2012-13)
Which of the following substances has the lowest electrical resistivity at room temperature? (NTSE Madhya Pradesh, Stage-I, 2012-13)
Aluminium
Iron
Nichrome
Diamond
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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)
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)
3.6 A, 6 V
0.5 A,5 V
2.0 A, 0.2 V
0.3 A, 3 V
4. If the temperature is increased, what will be the effect on the resistance of a conductor (NTSE Panchkula, Chandigarh, Stage-I, 2012-13)
Does not change
Decreases
Increases
Cannot say
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)
15 mW
14 mW
12 mW
10 mW
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