An electron (charge -e) is rotating in a circular orbit of radius R, around a pr

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Question
An electron (charge -e) is rotating in a circular orbit of radius R, around a proton with charge +e at a constant angular velocity ?. The orbital magnetic dipole moment is
Options
A. 0.5 e? R²
B. e? R²
C. 2 e? R²
D. 0.5 e? R³

Correct Answer

0.5 e? R²

Materials and Components problems

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2. The number of tightly bound electrons in silicon atom are
Options
A. 14
B. 10
C. 6
D. 4

3. A dielectric is subjected to alternating field. The dielectric losses are potential to
Options
A. real part of dielectric constant
B. imaginary part of dielectric constant
C. both real and imaginary parts of dielectric constant
D. either real or imaginary part of dielectric constant

7. A circular sphere mile is the area of cross-section of a wire
Options
A. having a diameter equal to 1 miles
B. having a radius equal to 1 miles
C. having a circumference equal to 1 miles
D. none of the above

10. In its lowest state, the electron is bound to the field of proton by an energy equal to
Options
A. 100.5 eV
B. 51.2 eV
C. 13.6 eV
D. 0.2 eV

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