In hydrogen atom which quantity is integral multiple of
|
(a) Angular momentum |
(b) Angular velocity |
|
(c) Angular acceleration |
(d) Momentum |
In hydrogen atom which quantity is integral multiple of
|
(a) Angular momentum |
(b) Angular velocity |
|
(c) Angular acceleration |
(d) Momentum |
(a) Angular momentum
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A circular loop of radius 0.0157m carries a current of 2.0 amp. The magnetic field at the centre of the loop is (
|
(a) 1.57 |
(b) 8.0 |
|
(c) 2.5 |
(d) 3.14 |
Shown in the figure here is a convergent lens placed inside a cell filled with a liquid. The lens has focal length + 20 cm when in air and its material has refractive index 1.50. If the liquid has refractive index 1.60, the focal length of the system is

|
(a) + 80 cm |
(b) – 80 cm |
(c) – 24 cm |
(d) –100 cm |
Speed of light is maximum in
|
(a) Water |
(b) Air |
(c) Glass |
(d) Diamond |
Penetrating power of X-rays depends on
|
(a) Current flowing in the filament |
(b) Applied potential difference |
|
(c) Nature of the target |
(d) All the above |
The mass of ions deposited during a given interval of time in the process of electrolysis depends on
|
(a) The current |
(b) The resistance |
(c) The temperature |
(d) The electric power |
When air in a capacitor is replaced by a medium of dielectric constant K, the capacity
|
(a) Decreases K times |
(b) Increases K times |
(c) Increases |
(d) Remains constant |
The particles emitted by radioactive decay are deflected by magnetic field. The particles will be
|
(a) Protons and α - particles |
(b) Electrons, protons and α -particles |
|
(c) Electrons, protons and neutrons |
(d) Electrons and α -particles |