MCQ
Anti-nodal curves represent the points joining:
- ADestructive interference
- BConstructive interference
- CEqual pressure curves
- DZero pressure curves
Explanation:
Conceptual, anti node represents joining of all points in constructive interface as the amplitude is high.
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Starting with a sample of pure
of it decays into Zn in 15 min. The corresponding half-life is
| (a) 5 min |
(b) 7 |
(c) 10 min |
(d) 15 min |
For intensity I of a light of wavelength 5000Å the photoelectron saturation current is 0.40 μA and stopping potential is 1.36 V, the work function of metal is
|
(a) 2.47 eV |
(b) 1.36 eV |
(c) 1.10 eV |
(d) 0.43 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 |