- ✓$\left[ M ^1 L^1 T^{-3} A^{-1}\right]$
- B$\left[ M ^1 L^2 T^{-3} A^{-1}\right]$
- C$\left[ M ^1 L^1 T^{-2} A^{-1}\right]$
- D$\left[ M ^0 L^1 T^{-3} A^{-1}\right]$
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The kinetic energy of electron in the first Bohr orbit of the hydrogen atom is
| (a) – 6.5 eV | (b) – 27.2 eV | (c) 13.6 eV | (d) – 13.6 eV |
Charge q is uniformly distributed over a thin half ring of radius R. The electric field at the centre of the ring is
|
(a) |
(b) |
(c) |
(d) |
A frog can be deviated in a magnetic field produced by a current in a vertical solenoid placed below the frog. This is possible because the body of the frog behaves as
|
(a) Paramagnetic |
(b) Diamagnetic |
(c) Ferromagnetic |
(d) Antiferromagnetic |
A certain charge liberates 0.8 gm of . The same charge will liberate how many gm of silver
|
(a) 108 gm |
(b) 10.8 gm |
(c) 0.8 gm |
(d) |
If Fresnel’s biprism experiment as held in water inspite of air, then what will be the effect on fringe width
|
(a) Decrease |
(b) Increase |
(c) No effect |
(d) None of these |
The velocity of an electron in the second orbit of sodium atom (atomic number = 11) is v. The velocity of an electron in its fifth orbit will be
|
(a) v |
(b) |
(c) |
(d) |
Which of the following is quantised according to Bohr’s theory of hydrogen atom
| (a) Linear momentum of electron | (b) Angular momentum of electron |
| (c) Linear velocity of electron | (d) Angular velocity of electron |
The acceleration of an electron in an electric field of magnitude 50 V/cm, if e/m value of the electron is 1.76
is
|
(a) 8.8 |
(b) 6.2 |
(c) 5.4 |
(d) Zero |