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Electrical resistivities of some substan...

Electrical resistivities of some substances at `20^@C` are given below:

Which material would you advise to be used in electrical heating devices. Why?

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Electrical resistivities of some substances at 20^@C are given below: Among silver and copper, which one is a better conductor? Why?

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MODERN PUBLICATION-ELECTRICITY-EXERCISE
  1. What is the meaning of the terms frequency of an altrnating current? W...

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  2. Electrical resistivities of some substances at 20^@C are given below: ...

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  3. Electrical resistivities of some substances at 20^@C are given below: ...

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  4. What is electric circuit?

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  5. Calculate the resistance of an electric bulb which allows a 10 A curre...

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  6. A piece of wire having resistance R is cut into four parts. How does t...

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  7. A piece of wire having resistance R is cut into four parts. How does t...

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  8. In an experimenal to study the dependance of current on potential diff...

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  9. Calculate the equivalent resistance between the points A and B in the ...

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  10. Calculate the equivalent resistance of the network across the points A...

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  11. When two resistors of resistance R1 and R2 are connected in parallel, ...

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  12. Three resistors are connected as shown. Through a resistor of 5 ohm, a...

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  13. Three resistors are connected as shown. Through a resistor of 5 ohm, a...

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  14. Three resistors are connected as shown. Through a resistor of 5 ohm, a...

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  15. An electric bulb is rated 220V and 100 W. what is its resistance? Five...

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  16. State the formula correlating the electric current flowing in a conduc...

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  17. A torch bulb is rated 5 V and 500 mA. Calculate its power?

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  18. A torch bulb is rated 5 V and 500 mA. Calculate resistance?

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  19. A torch bulb is rated 5 V and 500 mA. Calculate energy consumed when i...

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  20. In the given circuit, calculate the total effective resistance.

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