Question

1.Which of the following is wrong? Resistivity of a conductor is (a) independent of temperature. (b) inversely proportional to temperature. (c) independent of dimensions of conductor. (d) less than resistivity of a semiconductor. Answer/Explanation 2. Drift velocity vd varies with the intensity of electric field as per the relation (a) vd ∝ E (b) vd ∝ \frac{1}{E} (c) vd = constant (d) vd ∝ E² Answer/Explanation 3. Three resistors each of 2 ohm are connected together in a triangular shape. Fig:1 The resistance between any two vertices will be (a) 4/3 ohm (b) 3/4 ohm (c) 3 ohm (d) 6 ohm 4. The resistivity of alloy manganin is (a) Nearly independent of temperature (b) Increases rapidly with increase in temperature (c) Decreases with increase in temperature (d) Increases rapidly with decrease in temperature Answer 5. An electric heater is connected to the voltage supply. After few seconds, current gets its steady value then its initial current will be (a) equal to its steady current (b) slightly higher than its steady current (c) slightly less than its steady current (d) zero Answer​

Answer 1

Answer:

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