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
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
X-rays are known to be electromagnetic radiations. Therefore the X-ray photon has
| (a) Electric charge |
| (b) Magnetic moment |
| (c) Both electric charge and magnetic moment |
| (d) Neither electric charge nor magnetic moment |
If the critical angle for total internal reflection from a medium to vacuum is 30°, the velocity of light in the medium is
|
(a) 3 |
(b) 1.5 |
(c) 6 |
(d) |
A nuclear bomb exploded 200 km above the surface of moon. The sound of explosion on the moon
|
(a) Will heard before the explosion is seen |
|
(b) Will be heard at the same time |
|
(c) Will be heard after explosion |
|
(d) Will not heard at all |
The nuclear reaction
(mass of deuteron = 2.0141 a.m.u. and mass of He = 4.0024 a.m.u.) is
|
(a) Fusion reaction releasing 24 MeV energy |
|
(b) Fusion reaction absorbing 24 MeV energy |
|
(c) Fission reaction releasing 0.0258 MeV energy |
|
(d) Fission reaction absorbing 0.0258 MeV energy |
Minimum energy required to takeout the only one electron from ground state of
is
|
(a) 13.6 eV |
(b) 54.4 eV |
(c) 27.2 eV |
(d) 6.8 eV |
The frequency of a FM transmitter without signal input is called
|
(a) Lower side band frequency |
(b) Upper side band frequency |
|
(c) Resting frequency |
(d) None of these |