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In which of the following the carriers o...

In which of the following the carriers of electric current are electrons only? A) SUPER CONDUCTOR B) A VOLTAIC CELL C) A SEMICONDUCTOR D) A HYDROGEN DISCHARGE TUBE

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Verified by Experts

The correct Answer is:
C
By applying impulse-momentum theorem
`=|(m_(1)vec(v)_(1) + m_(2)vec(v)_(2)) - (m_(1)vec(v)_(1) + m_(2)vec(v)_(2))|`
`= |(m_(1) + m_(2)) vec(g) (2L_(0))| - 2(m_(1) + m_(2)) g t_(0)`
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ALLEN -CURRENT ELECTRICITY-EXERCISE-V B
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  4. See the electrical circuit shown in this figure. Which of the followin...

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  5. A galvanometer having a coil resistance of 60 Omega shows full scale...

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  6. A student measures the terminal potential difference (V) of a cell (of...

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  7. If an electron revolves in the circular path of radius 0.5A^(@) at a f...

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  9. In the shown arrangement of the experiment of the meter bridge if AC c...

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  10. A potentiometer circuit is setup as shown. The potential gradient acro...

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  11. A galvanometer has a coil of resistance 100 Omega and gives a full-sc...

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  12. A galvanometer has resistance 48Omega if a shunt of 6Omega is added wi...

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  13. For a the current loops shown in the figu re, kirchhoff's loop rule f...

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  14. If 2 ×10^(6) electrons/s are flowing through an area of cross section ...

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  15. A current of 2 A flows through a 2 Omega resistor when connected acros...

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  16. If power dissipated in the 9 Omega resistor in the resistor shown is 3...

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  17. In the circuit shown in the figure, if potentail at point A is taken t...

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  18. A galvanometer of resistance G is shunted by a resistance S ohm. To...

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  19. A thermocouple of negligible resistance produces an emf fo 40 mu V//^(...

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