Basic Electricity MCQs
16. Question
When sound waves travel from air to water, which of the following remains constant ?
Answer
17. Question
Hydrogen atom is excited from ground state to another state with principal quantum number equal to 4. Then the number of spectral lines in the emission spectra will be :
Answer
18. Question
The mass defect per nucleon is called
Answer
19. Question
In optical fibre, the diameter of the core is kept small this ensures that
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20. Question
The angular momentum of an electron in first orbit of Li+ ion is
Answer