- AVolt.
- BFarad.
- CHenry.
- DHertz.
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Rest mass energy of an electron is 0.51 MeV. If this electron is moving with a velocity 0.8 c (where c is velocity of light in vacuum), then kinetic energy of the electron should be.
|
(a) 0.28 MeV |
(b) 0.34 MeV |
(c) 0.39 MeV |
(d) 0.46 MeV |
In P-N junction, the barrier potential offers resistance to
|
(a) Free electrons in N region and holes in P region |
|
(b) Free electrons in P region and holes in N region |
|
(c) Only free electrons in N region |
|
(d) Only holes in P region |
In the lowest energy level of hydrogen atom, the electron has the angular momentum
|
(a) |
(b) h/ |
(c) h/2 |
(d) |
A straight wire carrying a current
runs along the axis of a circular current
. Then the force of interaction between the two current carrying conductors is
|
(a) ∞ |
(b) Zero |
(c) |
(d) |
The ratio of the magnetic field at the centre of a current carrying coil of the radius a and at a distance ‘a’ from centre of the coil and perpendicular to the axis of coil is
|
(a) |
(b) |
(c) |
(d) 2 |