- AMove towards A
- BMove towards B
- CMove at right angles to the line joining A and B
- DRemain at rest
Explanation:
Given that point A is at lower electric potential than point B. The electron between them on line joining will move.
We have to find where this electron moves.
Since we know that electric currents move from a higher potential or a lower potential. Also, electrons move in the direction opposite to electric current. So the electron on the line joining two points A and B will move from lower to higher potential i.e, it will move towards B.
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(a) Absorption |
(b) Scattering |
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(c) Neither absorption nor scattering |
(d) Both (a) and (b) |
In a triode valve
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(a) If the grid voltage is zero then plate current will be zero |
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(b) If the temperature of filament is doubled, then the thermionic current will also be doubled |
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(c) If the temperature of filament is doubled, then the thermionic current will nearly be four times |
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(d) At a definite grid voltage the plate current varies with plate voltage according to Ohm’s law |
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(a) |
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(b) |
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(c) |
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(d) |
In a PN-junction
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(a) P and N both are at same potential |
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(b) High potential at N side and low potential at P side |
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(c) High potential at P side and low potential at N side |
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(d) Low potential at N side and zero potential at P side |