- A[L T A].
- B[L-1 T A].
- C[L-2 T A].
- D[L-3 T A].
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An electron jumps from the 4th orbit to the 2nd orbit of hydrogen atom. Given the Rydberg's constant
. The frequency in Hz of the emitted radiation will be
|
(a) |
(b) |
(c) |
(d) |
A circular loop of radius 0.0157m carries a current of 2.0 amp. The magnetic field at the centre of the loop is (
|
(a) 1.57 |
(b) 8.0 |
|
(c) 2.5 |
(d) 3.14 |
The resultant magnetic moment of neon atom will be
|
(a) Infinity |
(b) mB |
(c) Zero |
(d) mB/2 |
Light appears to travel in straight lines since
|
(a) It is not absorbed by the atmosphere |
|
(b) It is reflected by the atmosphere |
|
(c) Its wavelength is very small |
|
(d) Its velocity is very large |
What is the momentum of a photon having frequency 1.5 ![]()
|
(a) 3.3 |
(b) 3.3 |
|
(c) 6.6 |
(d) 6.6 |
The effective resistance between points A and B is
|
(a) 10 Ω |
(b) 20 Ω |
|
(c) 40 Ω |
(d) None of the above three values |
The phenomenon of light passing through the object is called: