Radio waves and visible light in vacuum have
|
(a) Same velocity but different wavelength |
|
(b) Continuous emission spectrum |
|
(c) Band absorption spectrum |
|
(d) Line emission spectrum |
(a) Same velocity but different wavelength
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For the Bohr's first orbit of circumference 2πr, the de-Broglie wavelength of revolving electron will be
|
(a) 2πr |
(b) πr |
(c) |
(d) |
Electroplating does not help in
|
(a) Fine finish to the surface |
(b) Shining appearance |
|
(c) Metals to become hard |
(d) Protect metal against corrosion |
The minimum energy required to excite a hydrogen atom from its ground state is
|
(a) 13.6 eV |
(b) -13.6 eV |
(c) 3.4 eV |
(d) 10.2 eV |
The current inside a copper voltameter
|
(a) Is half the outside value |
(b) Is the same as the outside value |
|
(c) Is twice the outside value |
(d) Depends on the concentration of |
