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Are the paths of free electrons straight...

Are the paths of free electrons straight lines between successive collisions (with the positive ions of metal wire) in the-
(i) Absence of electric field (ii) Presence of electric field

Text Solution

Verified by Experts

(i) Yes (ii) No
[Hint: (i) Straight line with very high thermal speed
` (10^(5) m//s)`
(ii) No, (probably it is curved because there is a motion of charge `(e^(–))` in electric field)
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MOTION-Electrical Instrument -EXERCISE -3
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  7. In a ammeter 0.2% of main current passes through the galvanometer. If ...

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  8. If an ammeter is to be used in place of a voltmeter, then we must conn...

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  9. The length of a wire of a potentiometer is 100 cm, and the e.m.f. of i...

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  10. An ammeter reads upto 1 ampere. Its internal resistance is 0.81 ohm. T...

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  11. In a meter bridge experiment null point is obtained at 20 cm. from one...

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  12. In a potentiometer experiment the balancing with a cell is at length 2...

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  13. In a Wheatstone's bridge, three resistances P,Q and R connected in the...

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  14. Shown in the figure below is a meter- bridge set up will null deflecti...

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  15. The current in the primary circuit of a potentiometer is 0.2 A. The sp...

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  16. On interchanging the resistances, the balance point of a meter bridge ...

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  17. In a potentiometer experiment it is found that no current passes throu...

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