- 1(current)
Q. No.Temperature dependence of resistivity (T) of semiconductors, insulators, and metals is significantly based on the following factors:
| (a) | number of charge carriers can change with temperature T |
| (b) | the time interval between two successive collisions can depend on T |
| (c) | length of material can be a function of T |
| (d) | mass of carriers is a function of T |
Which of the above statements is correct?
1. (a, b)
2. (c, d)
3. (b, c)
4. (b, d)
Subtopic: Derivation of Ohm's Law |
76%
From NCERT
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A metal rod of length 10 cm and a rectangular cross-section of \(1~ \text {cm} \times 1/2~ \text {cm}\) is connected to a battery across opposite faces. The resistance will be:
| 1. | maximum when the battery is connected across\(1~ \text {cm} \times 1/2~ \text {cm}\) faces. |
| 2. | maximum when the battery is connected across \(10~ \text {cm} \times 1~ \text {cm}\) faces. |
| 3. | maximum when the battery is connected across \(10~ \text {cm} \times 1/2~ \text {cm}\) faces. |
| 4. | same irrespective of the three faces. |
Subtopic: Derivation of Ohm's Law |
58%
From NCERT
To view explanation, please take trial in the course.
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Hints
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- 1(current)
Q. No.
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