- A103C
- B10C
- C10 - 2C
- D10 - 3C
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Assertion : In the given circuit if lamp B or C fuses then light emitted by lamp A decreases.

Reason : Voltage on A decreases.
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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. |
An electron passing through a potential difference of 4.9 V collides with a mercury atom and transfers it to the first excited state. What is the wavelength of a photon corresponding to the transition of the mercury atom to its normal state
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(a) 2050 Å |
(b) 2240 Å |
(c) 2525 Å |
(d) 2935 Å |

Which of the following is true
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(a) Lyman series is a continuous spectrum |
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(b) Paschen series is a line spectrum in the infrared |
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(c) Balmer series is a line spectrum in the ultraviolet |
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(d) The spectral series formula can be derived from the Rutherford model of the hydrogen atom |
A frictionless dielectric plate S is kept on a frictionless table T. A charged parallel plate capacitance C (of which the plates are frictionless) is kept near it. The plate S is between the plates. When the plate S is left between the plates
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(a) It will remain stationary on the table |
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(b) It is pulled by the capacitor and will pass on the other end |
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(c) It is pulled between the plates and will remain there |
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(d) All the above statements are false |
The angle of dip is the angle
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(a) Between the vertical component of earth's magnetic field and magnetic meridian |
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(b) Between the vertical component of earth's magnetic field and geographical meridian |
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(c) Between the earth's magnetic field direction and horizontal direction |
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(d) Between the magnetic meridian and the geographical meridian |