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The rating of a heating element is 220 V...

The rating of a heating element is 220 V-1,000 W. if the heating elements is stretched to double of its initial length then what will be the power rating for the same voltage ?

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To solve the problem step by step, we will follow these steps: ### Step 1: Understand the given values The heating element has a power rating of 1000 W at a voltage of 220 V. ### Step 2: Calculate the initial resistance of the heating element Using the formula for power: \[ P = \frac{V^2}{R} \] ...
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MODERN PUBLICATION-CURRENT ELECTRICITY-Chapter Practice Test
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  2. Is current density a vector or a scalar? Express its relation with ele...

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  3. State the direction of drift velocity of electron with respect to the ...

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  4. Why is manganin preferred over conductors like copper to construct sta...

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  5. Is the graph showing variation of current versus voltage for a diode l...

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  6. On increasing the temperature of a copper conductor, its resistivity i...

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  7. Prove that the current density of a metallic conductor is directly pro...

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  8. Deduce Ohm's law using the concepts of drift velocity and relaxation t...

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  9. Define mobility of a charge carrier.What is its relation with relaxati...

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  10. Write the sequence of colours in a carbon resistor having resistances ...

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  11. A cell of emf E and internal resistance r is connected across an exter...

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  12. State the principle of potentiometer. Draw a circuit diagram used to c...

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  13. With the help of a circuit diagram, explain the working principle of a...

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  14. Obtain the condition for bridge balance in Wheatstone's bridge.

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  15. Answer the following : (a) Why are the connections between the resi...

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  16. n-identical cells each of emf E and internal resistance r are connecte...

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