Broadcasting antennas are generally
|
(a) Omnidirectional type |
(b) Vertical type |
(c) Horizontal type |
(d) None of these |
Broadcasting antennas are generally
|
(a) Omnidirectional type |
(b) Vertical type |
(c) Horizontal type |
(d) None of these |
(b) Vertical type
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In Bohr's model of hydrogen atom, let PE represents potential energy and TE the total energy. In going to a higher level
|
(a) PE decreases, TE increases |
(b) PE increases, TE increases |
|
(c) PE decreases, TE decreases |
(d) PE increases, TE decreases |
If we express the energy of a photon in KeV and the wavelength in angstroms, then energy of a photon can be calculated from the relation
|
(a) E = 12.4 hv |
(b) E = 12.4 h/ |
(c) E = 12.4/ |
(d) E = hv |

If a unit positive charge is taken from one point to another over an equipotential surface, then
|
(a) Work is done on the charge |
(b) Work is done by the charge |
|
(c) Work done is constant |
(d) No work is done |
A conducting wire is dropped along east-west direction, then
|
(a) No emf is induced |
|
(b) No induced current flows |
|
(c) Induced current flows from west to east |
|
(d) Induced current flows from east to west |
Which of the following could not produce a virtual image
|
(a) Plane mirror |
|
(b) Convex mirror |
|
(c) Concave mirror |
|
(d) All the above can produce a virtual image |