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Name two characteristics of a heater coi...

Name two characteristics of a heater coil.

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A heater coil should have (i) high resistivity and (it) high melting point.
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KUMAR PRAKASHAN-ELECTRICITY-OBJECTIVE QUESTIONS AND ANSWERS (Answer the following questions as directed (Miscellaneous):)
  1. How does the potential difference divide itself in a series combinatio...

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  2. How is heat produced in a conductor by an electric current?

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  3. If a number of bulbs of different wattages are joined in parallel With...

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  4. Which bulb will glow With maximum brightness in case bulbs of differen...

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  5. What can you say about the resistance of an ammeter?

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  6. What can you say about the resistance of a voltmeter?

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  7. How does the resistance of a metallic Wire depend on its temperature?

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  8. Two wires have the same length, same radius but one of them is made of...

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  9. Name a substance whose resistance decreases with temperature.

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  10. Name a substance whose resistance almost remains unchanged With a chan...

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  11. Distinguish between the kilowatt and the kilowatt hour.

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  12. Name two characteristics of a heater coil.

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  13. The power-voltage rating of an electric appliance is 100 W- 250 V What...

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  14. Why is much less heat generated in long electric cables than in the fi...

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  15. How much energy is consumed by 2 kW AC when used for 2 hour?

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  16. A wire of resistivity p is pulled to double its length. What will be i...

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  17. How does the resistance of an ohmic conductor depend on the applied v...

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  18. What causes the potential difference between the two terminals of a ce...

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  19. Name and define the smallest commercial unit of electricity.

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  20. If, the current I, through a resistor is increased by 100.% (assume th...

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