Explanation:
If the lines cross each other at a given location, then there must be two distinctly different values of electric field with their own individual direction at that given location. This could never be the case. Therefore the lines representing the field cannot cross each other at any given location.
Electric field end at a negative charge.
Along the electric field line potential drops.
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If a drop of water is introduced between the glass plate and a convex lens in a Newton's ring system, the ring system:
The plate current ip in a triode valve is given 
where ip is in milliampere and Vp and Vg are in volt. If rp = 104 ohm, and 
, then for 
and 
, what is the value of K and grid cut off voltage
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(a) – 6V, (30)3/2 |
(b) -6 V, |
(c) + 6V, (30)3/2 |
(d) + 6V, (1/30)3/2 |
Assertion : In photoelectric effect, on increasing the intensity of light, both the number of electrons emitted and kinetic energy of each of them get increased but photoelectric current remains unchanged.
Reason : The photoelectric current depends only on wavelength of light.
|
(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. |
|
(b) If both assertion and reason are true but reason is not the correct explanation of the assertion. |
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(d) If the assertion and reason both are false. |
