The number of protons in a copper atom are 2 9 11 29

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Question
The number of protons in a copper atom are
Options
A. 2
B. 9
C. 11
D. 29

Correct Answer

29

Materials and Components problems

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2. Assertion (A): Dielectric constant is independent of temperature unless the temperature is extremely high.
Reason (R): For normal temperatures the number of atoms per unit volume is constant.
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

6. The most important set of specifications of transformer oil include
Options
A. dielectric strength and viscosity
B. dielectric strength and flash point
C. viscosity and flash point
D. flash point and viscosity

7. If ?_p is permanent dipole moment and T is absolute temperature, the orientation polarization of polyatomic gases is
Options
A. proportional to ?_p²T
B. proportional to
C. proportional to ?_p T
D. proportional to

10. Assertion (A): If an atom of polarizability a is placed in homogeneous field E, the energy stored is 0.5 aE².
Reason (R): Capacitance of an isolated conducting sphere R in vacuum is 4 p?₀ R farads.
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

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