Explanation:
Electric field lines explain the orientation of the electric field in the region and it points tangential to the point at which it is drawn. Thus at any point, the tangent to the electric field line matches the direction of the electric field.
The density of the field lines at a point determines the strength of the electric field at that point.
Therefore, if the potential at each point of the conductor is the same, then it means that there are no electric lines that may begin or end on the conductor.
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N atoms of a radioactive element emit n alpha particles per second. The half life of the element is
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(a) |
(b) |
(c) |
(d) |
If an insulated non-conducting sphere of radius R has charge density ρ. The electric field at a distance r from the centre of sphere (r < R) will be
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(a) |
(b) |
(c) |
(d) |
Wave is associated with matter
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(a) When it is stationary |
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(b) When it is in motion with the velocity of light only |
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(c) When it is in motion with any velocity |
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(d) None of the above |
Assertion : The ion cannot move with a speed beyond a certain limit in a cyclotron.
Reason : As velocity increases time taken by ion increases.
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(a) If both assertion and reason are true and the reason is the correct explanation of the assertion. |
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(b) If both assertion and reason are true but reason is not the correct explanation of the assertion. |
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(c) If assertion is true but reason is false. |
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(d) If the assertion and reason both are false. |
