As per Bohr's postulate, only those circular orbits are stable for which the ang

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Question
As per Bohr's postulate, only those circular orbits are stable for which the angular momentum is equal to an integer times .
Options
A. True
B. False

Correct Answer

True

Explanation

It is a quantum condition postulated by Bohr.

Materials and Components problems

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3. A liquid has N permanent dipoles ?_p per unit volume and has been subjected to dc field for a long time such that orientation polarization is P₀. At t = 0, the field is suddenly removed, then polarization
Options
A. will remain constant at P₀
B. will become zero at t = 0
C. will delay to zero with a time constant
D. either b or c

4. Assertion (A): Ferromagnetic materials possess ferromagnetic properties only when temperature is less than paramagnetic curie temperature.
Reason (R): For a ferromagnetic material for T > ?_f.
Options
A. Both A and R are true and R is correct explanation of A
B. Both A and R are true but R is not correct explanation of A
C. A is true but R is false
D. A is false but R is true

5. In carbon resistor colour code, if the third band is of silver, it indicates
Options
A. that three zeros are to be added to indicate the resistance value
B. multiplier is 0.01
C. multiplier is 0.1
D. tolerance is � 5%

7. In a specimen of silicon steel, a field strength of 200 A/m causes a flux density of 0.5 T. In a specimen of cast iron, the same H would cause B to be
Options
A. 0.5 T
B. less than 0.5 T
C. more than 0.5 T
D. 0.5 T or more or less

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