MCQ
Soap bubble looks coloured due to:
- ADispersion
- BReflection
- CInterference
- DNone of these
Explanation:
Colours are seen due to interference between waves reflected from the top and bottom of soap bubble.
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Approximate height of ozone layer above the ground is
|
(a) 60 to 70 km |
(b) 59 km to 80 km |
(c) 70 km to 100 km |
(d) 100 km to 200 km |
Which of the following pairs is an isobar
|
(a) |
(b) |
(c) |
(d) |
The specific charge of an electron is
|
(a) 1.6 |
(b) 4.8 |
|
(c) 1.76 |
(d) 1.76 |
A proton is accelerated through 50,000 V. will increase Its energy by
|
(a) 5000 eV |
(b) 8 |
(c) 5000 J |
(d) 50,000 J |