- AGauss
- BOersted
- CAmpere
- DGilbert
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Which of the following (referred to a spherical mirror) do (does) not depend on whether the rays are paraxial or not?
An electron experiences a force equal to its weight when placed in an electric field. The intensity of the field will be
|
(a) 1.7 |
(b) 5.0 |
(c) 5.5 |
(d) 56 N/C |
Force acting upon a charged particle kept between the plates of a charged condenser is F. If one plate of the condenser is removed, then the force acting on the same particle will become
|
(a) 0 |
(b) F/2 |
(c) F |
(d) 2F |

If the energy of a photon corresponding to a wavelength of 6000 Å is 3.32
, the photon energy for a wavelength of 4000 Å will be
|
(a) 1.4 eV |
(b) 4.9 eV |
(c) 3.1 eV |
(d) 1.6 eV |