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Solve the following examples/ numerical problems.
A potential differnce of 250 volts is applied across a resistance of 1000 ohm in an electric iron. Find (1) the current (2) the heat produced in joule in 12 seconds. Keeping other conditions the same, if the length of the wire in the iron is reduced to half the original length ( by cutting the wire), what will be the current and heat produced?

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NAVNEET PUBLICATION-EFFECTS OF ELECTRIC CURRENT-EXERCISE
  1. An electric iron of 1100 W is operated for 2 hrs. daily. What will be ...

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  2. Solve the following examples/ numerical problems. Find the heat prod...

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  3. Solve the following examples/ numerical problems. Calculate the heat...

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  4. Solve the following examples/ numerical problems. A potential differ...

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  5. Solve the following examples/ numerical problems. A potential differ...

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  6. When the voltage applied across a bulb is 220 v the current passing th...

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  7. A bulb of 100 w is connected across a source of 220 v. Find the curren...

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  8. A bulb of 60 w is connected across a source of 240 v . Find the resist...

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  9. If the current passing through a bulb is 0.15 A and the power of the b...

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  10. An electric appliances of rating 800 w is used 4 hours per day in the ...

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  11. An electric appliances rated 400 w is used 5 hours per day in the mont...

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  12. An electric bulb rated 60 w is used 10 hours per day for 20 days. If t...

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  13. Two electric bulbs rated 60 w and 40 w respectively. are used 5 hours ...

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  14. Find the heat produced in joule if a current of 0.1 A is passed throug...

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  15. Calculate the heat produced in calorie when a current of 0.1 A is pas...

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  16. Calculate the heat produced in calorie when a current of 0.2 A is pas...

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  17. Find the heat produced in calorie when a current of 0.2 A is passed th...

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  18. A potential difference of 100 v is applied across a wire of resistance...

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  19. A potential difference of 100 v is applied across a wire for two minut...

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  20. A potential difference of 100 v is applied across a wire for 6 minutes...

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