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A wire with an area of cross-section as `10 mm^2` has a resistance of `5Omega`, when a potential difference across its ends is 25V. Calculate the drift velocity of electrons. Given the number density of electrons as `5 xx 10^20` electrons per cubic meter (`e//m^-3`)

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Awire with ana area of cross section as 10 mm^2 has resistance of 5 Omega when a potential difference across its ends is 25 V. calculate the drift velocity of electrons. Given the number density of electron as 5 xx10^20 electrons per cubic meter (em^-3)

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PUNJAB BOARD PREVIOUS YEAR PAPERS-Electric Current, Resistance and E.M.F. -Exercise
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  2. If maximum resistance from the combination of two resistances is 18 oh...

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  3. A wire with an area of cross-section as 10 mm^2 has a resistance of 5O...

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  4. A wire with an area of cross-section as 1 mm2 has a resistance of 10Q,...

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  5. Given three resistors of resistances 1Q (Ohm), 2Q (Ohm) and 3Q (Ohm). ...

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  6. How many electrons pass through alamp inone minute if current flowing ...

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  7. How does the conductivity of metals varies with the rise in their temp...

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  8. Why Eureka metal is used to make standard resistance coil?

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  9. Why copper is used to make connecting wires ?

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  10. How does the conductivity of semi-conductors varies with the rise in t...

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  11. Why Manganin is used to make standard resistance coil ? How does the e...

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  12. Define one Ampere of current.

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  13. What is the resistance of an ideal voltmeter and an ammeter?

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  14. The specific resistance of a conductor increases with Increase in temp...

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  15. The specific resistance of a conductor increases with Increase in cros...

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  16. The specific resistance of a conductor increases with Decrease in leng...

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  17. The specific resistance of a conductor increases with Increase in cros...

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  18. Why the fuse wire should have high resistance and low melting point?

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  19. Why the fuse wire should have high resistance and low melting point?

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  20. A fuse wire is a wire of Low resistance and high melting point.

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