1 ) If 60 capacitors, each of capacitance C are connected in series and then in parallel . So what would be the ratio of Cs/Cp ?
A ) 1 , B ) 60 ,
C ) 1/60 , D ) 1/3600 ,
Correct Answer : - D ) 1/3600 ,
Solution : -
2 ) When a capacitor is fully charged , then current …………. flow .
A ) will , B ) will not ,
C ) may or may not , D ) None of these ,
Correct Answer : - B ) will not ,
3 ) ( Water ) ………… can not be used as dielectric in capacitor .
4 ) Some charge is given to a conductor . Then its potential remains same throughout the conductor .
5 ) The capacitance of capacitors are of ratio of 1 : 2 : 3 , their equivalent capacitance in parallel is greater than their equivalent capacitance in series by 60/11 . Calculate their individual capacitance ?
A ) 0 , B ) 1 ,
C ) 2 , D ) 3 ,
Correct Answer : - B ) 1 ,
Solution : -
Lets we have 3 capacitors : - 1C , 2C , 3C .
And we have to find value of C .
Formula : -
For parallel : - Cp = 1C + 2C +3C = 6C ,
For series : -
Ø (1/Cs) = (1/1C) + (1/2C) + (1/3C) ,
Ø (1/Cs) = (11 / 6C) ,
Ø Cs = 6C/11 ,
So as given in question : - their equivalent capacitance in parallel is greater than their equivalent capacitance in series by 60/11 :-
Ø Cp = (60/11) + Cs ,
Ø 6C = (60/11) + 6C/11 ,
Ø 6C = (60 + 6C) / 11 ,
Ø 6C * 11 = 60 + 6C ,
Ø 66C = 60 + 6C ,
Ø 66C - 6C = 60 ,
Ø 60C = 60 ,
Ø C = 1 (individual capacitance) , Answer .
6 ) Two capacitor of equivalent capacitance C ,when connected in series have net capacitance of C1 and when connected in parallel have net capacitance of C2 . What is value of C1/C2 ?
A ) 2 , B ) 4 ,
C ) 8 , D ) 12 ,
Correct Answer : - B ) 4 ,
Solution : -
Formulas : -
For parallel : - C1 = C + C = 2C ,
For series : -
Ø (1/C2) = (1/C) + (1/C) ,
Ø (1/C2) = (2/C) ,
Ø C2 = C/2 ,
So C1/C2 = 2C / (C/2) = 4C / C = 4 , Answer .
Now go to online quiz section and Physics Quiz 5 is uploaded related to these mcqs , so check your preparation by this link : -
0 Comments