- AOnly on the intensity of light
- ✓On both the frequency of light and the distance between the source and the metal.
- COn the work function of metal
- DAll of the above
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A monochromatic beam of light falls on YDSE apparatus at some angle (say q) as shown in figure. A thin sheet of glass is inserted in front of the lower slit S2. The central bright fringe (path difference = 0) will be obtained
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(a) At O |
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(b) Above O |
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(c) Below O |
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(d) Anywhere depending on angle q, thickness of plate t and refractive index of glass m |
In a circuit with a coil of resistance 2 ohms, the magnetic flux changes from 2.0 Wb to 10.0 Wb in 0.2 second. The charge that flows in the coil during this time is
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(a) 5.0 coulomb |
(b) 4.0 coulomb |
(c) 1.0 coulomb |
(d) 0.8 coulomb |

There is an air filled 1 pF parallel plate capacitor. When the plate separation is doubled and the space is filled with wax, the capacitance increases to 2pF. The dielectric constant of wax is
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(a) 2 |
(b) 4 |
(c) 6 |
(d) 8 |
Assertion : Magnetic moment of an atom is due to both, the orbital motion and spin motion of every electron.
Reason : A charged particle produces a magnetic field.
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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. |
The time period of a thin bar magnet in earth’s magnetic field is T. If the magnet is cut into two equal parts perpendicular to its length, the time period of each part in the same field will be
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(a) |
(b) T |
(c) |
(d) 2T |