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1. ONE MARK QUESTIONS:1. Define resistivity of material.2. What is the power of torch bulb rated at 2.5V and 500mA?3. Why series arrangement not used for connecting domestic electrical appliances in a circuit?4. Which has higher resistance t a 50W bulb or a 2.5W bulb and how many times?5. What is the direction of flow of conventional current?6. Calculate the amount of charge flowing in a wire if it draws a current of 2A in 10 minutes7. What happens to resistance of a conductor if area of cross-section is doubled?8. Which device helps to maintain a potential difference across a conductor?9. Find the number of electron in 1C of charge.10. Name the physical quantity whose unit is V/A.11. Name the device that helps to maintain a potential a potential difference across a conductor. |
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Answer» (I) A conductor having some appreciable resistance is called as its resistivity. |
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