1 ) Isobars means compounds having same no. of . . . . . . . . . . . . . . . . : -
A ) protons , B ) neutrons ,
C ) both , D ) None of these .
Correct answer : - C ) both ,
Isobars : - same no. of ( protons + neutrons ) .
Isotones : - same no. of neutrons .
Isotopes : - same no. of protons .
2 ) Speed of sound in hot is . . . . . . . . . . . . . . . . . . . cold .
A ) greater than , B ) smaller than ,
C ) equal to , D ) None of these .
Correct answer : - A ) greater than ,
3 ) When an electron is in excited state , return to ground state , so what type of electromagnetic radiations are produced ?
A ) alpha , B ) beta ,
C ) gamma , D ) All of these .
Correct answer : - C ) gamma ,
Alpha : - They are He - nuclie praticals , not radiations .
Beta : - They are electrons . They are beta radiations , not an electromagnetic radiations .
Gamma : - Gamma rays are Electromagnetic radiations , so re - excite , it produces electromagnetic waves .
But atom emits x - rays , not r - rays .
r - rays are emitted by nucleus . Although X - rays and r - rays both are electromagnetic rays .
4 ) In a nucleic reactions , is it possible to transform an element into another ?
A ) Yes , B ) No ,
C ) may or may not , D ) None of these .
Correct answer : - A ) Yes ,
Yes we can transform an element into another as parent to daughter .
5 ) If a material has super conducting property at temperature T1 and T2 , Then T1 and T2 are less than some . . . . . . . . . . . . . . . . ,
A ) absolute temperature , B ) critical temperature ,
C ) zero temperature , D ) None of these .
Correct answer : - B ) critical temperature ,
6 ) According to Faraday , electric field lines go from . . . . . . . . . . . . . . ,
A ) negative to positive , B ) positive to negative ,
C ) positive to positive , D ) None of these .
Correct answer : - B ) positive to negative ,
Now go to online quiz section and Physics Quiz 10 is uploaded related to these mcqs , so check your preparation by this link : -
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