1 ) Current in LCR circuit becomes extremely large when ………………. ,
A ) inductive reactance is larger than capacitance reactance .
B ) Capacitance reactance is larger than inductance reactance .
C ) inductive reactance and capacitance reactance are equall .
D ) None of these ,
Correct Answer : - C ) inductive reactance and capacitance reactance are equall .
2 ) Magnitude of vectors A , B and C are 12 , 5 and 13 units and A + B = C . So angle θ ?
A ) 0 degree , B ) 90 degree ,
C ) 180 degree , D ) None of these ,
Correct Answer : -
Solution : -
Formula : -
(C)^2 = (A)^2+ (B)^2 + 2ABCos θ .
So ,
Ø ( 13 )^2 = ( 12 )^2 + ( 5 )^2 + 2 ( 12 ) * ( 5 ) * Cos θ ,
Ø 169 = 144 + 25 + 120 * Cos θ ,
Ø ( 169 – 144 – 25 ) / 120 = Cos θ ,
Ø 0 / 120 = Cos θ ,
Ø 
Ø θ = 90 degree , Answer .
3 ) Relation between resistance and radius of material : -
R = Resistance , r = radius .
A ) R α 1 / (r)^2 , B ) R α 1 / (r)^3 ,
C ) R α 1 / (r)^4 , D ) None of these ,
Correct Answer : - C ) R α 1 / (r)^4 ,
4 ) An inductor also called as a coil , choke or reactor .
5 ) The color of light emitting diode ( LED ) depends on ………………… ,
A ) Semiconductor material , B ) Conductor ,
C ) Its resistivity , D ) None of these ,
Correct Answer : - A ) Semiconductor material ,
6 ) The bulk properties of material such as their mode of fracture can be related to their ……….. ,
A ) Cleavage , B ) junction ,
C ) Closure , D ) None of these ,
Correct Answer : - A ) Cleavage ,
Now go to online quiz section and check your preparation by this link : -
 inductive reactance is larger than capacitance reactance . B ) Capacitance reactance is larger than inductance reactance . C ) inductive reactance and capacitance reactance are equall . D ) None of these ,){kind=link}
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