- 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 diffraction is obtained by using a beam of red light. What will happen if the red light is replaced by the blue light
|
(a) Bands will narrower and crowd full together |
|
(b) Bands become broader and further apart |
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(c) No change will take place |
|
(d) Bands disappear |
In the figure shown, the total resistance between A and B is
|
(a) 12 Ω |
(b) 4 Ω |
(c) 6 Ω |
(d) 8 Ω |
A wire 100 cm long and 2.0 mm diameter has a resistance of 0.7 ohm, the electrical resistivity of the material is
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(a) 4.4 |
(b) 2.2 |
|
(c) 1.1 |
(d) 0.22 |
The distance between the plates of a parallel plate condenser is 4mm and potential difference is 60 volts. If the distance between the plates is increased to 12mm, then
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(a) The potential difference of the condenser will become 180 volts |
|
(b) The P.D. will become 20 volts |
|
(c) The P.D. will remain unchanged |
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(d) The charge on condenser will reduce to one third |