Explanation:
Unequal width of slits will cause unequal intensity of lights entering from both slits.
As a result, during interference complete cancelling of light intensity will not take place at regions of otherwise dark fringe.
As the value of $\beta$ does not depend on intensity of light, there will be no shifting of fringes as well as no change in fringe width.
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Which of the following is dependent on the intensity of incident radiation in a photoelectric experiment
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(a) Work function of the surface |
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(b) Amount of photoelectric current |
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(c) Stopping potential will be reduced |
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(d) Maximum kinetic energy of photoelectrons |
In the circuit shown in figure, the current drawn from the battery is 4A. If 10 W resistor is replaced by 20 W resistor, then current drawn from the circuit will be
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(a) 1 A |
(b) 2 A |
(c) 3 A |
(d) 0 A |
The capacity of a parallel plate condenser is C. Its capacity when the separation between the plates is halved will be
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(a) 4 C |
(b) 2C |
(c) |
(d) |
Assertion : The earth’s magnetic field is due to iron present in its core.
Reason : At a high temperature magnet losses its magnetic property or magnetism.
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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 assertion is false but reason is true. |
The plates of a parallel plate capacitor of capacity 50 μC are charged to a potential of 100 volts and then separated from each other so that the distance between them is doubled. How much is the energy spent in doing so
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(a) 25 |
(b) -12.5 |
(c) -25 |
(d) 12.5 |
The magnet of a vibration magnetometer is heated so as to reduce its magnetic moment by 19%. By doing this the periodic time of the magnetometer will
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(a) Increase by 19% |
(b) Decrease by 19% |
(c) Increase by 11% |
(d) Decrease by 21% |
In order to increase the angular magnification of a simple microscope, one should increase:
