Network Theorems | Questions and Answers 1 | Electrical Viva Questions

Network Theorems | Questions and Answers 1 | Electrical Viva Questions

Network Theorems | Questions and Answers 1 | Electrical Viva Questions

Very helpful Questions and Answers are included related to network theorems which will helpful in GATE exam as well as competitive exam and Electrical Viva questions.


Network Theorems | Questions and Answers 1 | Electrical Viva Questions


Questions and Answers


Q.1. Kirchoff's current law states that

(a)net current flow at a junction is positive

(b)algebraic sum of current meeting at a junction is zero

(c)no current can leave the junction without some current entering it.

(d) total sum of the current meeting at the junction is zero.

Ans.

(b)algebraic sum of current meeting at a junction is zero


Q.2.  According to Kirchhoff's voltage law,
the algebraic sum of all IR drops and
e.m.f. in any closed loop of a network
is always

(a)negative

(b)positive

(c)determined by battery e.m.f.

(d)zero

Ans.

(d)zero


Q.3. Kirchhoff's current law is applicable to
only

(a)junction in a network

(b)closed loops in a network

(c)electric circuits

(d)electronic circuits

Ans.

(a)junction in a network


Q.4. Kirchhoff's voltage law is related to

(a)junction currents

(b)battery e.m.f.

(c)IR drops

(d)both(b)and(c)

(e)none of the above

Ans.

(d)both(b)and(c)


Q.5. Superposition theorem can be applied
only to circuits having

(a)resistive elements

(b)passive elements

(c)non-linear elements

(d)linear bilateral elements

Ans.

(d)linear bilateral elements


Q.6. The concept on which Superposition
theorem is based is

(a)reciprocity

(b)duality

(c)non-linearity

(d)linearity

Ans.

(d)linearity


Q.7. An ideal voltage source should have

(a)large value of e.m.f.

(b)small value of e.m.f.

(c)zero source resistance

(d)infinite source resistance

Ans.

(c)zero source resistance


Q.8. For a voltage source

(a)terminal voltage is always lower
than source e.m.f.

(b)terminal voltage cannot be higher
than source e.m.f.

(c)the source e.m.f.and terminal volt-
age are equal

Ans.

(b)terminal voltage cannot be higher
than source e.m.f.


Q.9. To determine the polarity of the voltage
drop across a resistor,it is necessary to
know

(a)value of current through the resistor

(b)direction of current through the
resistor

(c)value of resistor

(d)e.m.fs.in the circuit

Ans.

(b)direction of current through the
resistor


Q.10. 'maximum power output is obtained 
from a network when the load resis- 
tance is equal to the output resistance 
of the network as eeen from the ter- 
minals of the load". The above state- 
ment is associated with 

(a) Millman's theorem 

(b) Thevenin's theorem 

(c) Superposition the«»rem 

(d) Maximum power transfer theorem

Ans.

(d) Maximum power transfer theorem


Q.11.  "Any number of current sources in 
paralleFmay be replaced bw single 
current source whose current is the al- 
gebraic sum of individual source cur- 
rents and source resistance is the 
parallel combination of indiviaualsource resistances". 
The above etatement is associated with 

(a)Thevenin's theorem 

(b) Millman's theorem 

(c) Maximum power transfer theorem

(d) None of the above 

Ans.

(b) Millman's theorem 


Q.12. 'Tn any linear bilateral network, if a 
source of e. m, f.. E in any branch 
produces a current I in any other 
branch, then same e. m. f. Acting in the 
second branch would produce the samecurrent I in the first branch". 
The above statement is associated with 

(a) compensation theorem 

(b) superpositi on theorem 

(c) reciprocity theorem 

(d) none of the above 

Ans.

(a) compensation theorem 


Q.13. A linear resistor havingO<R<oo is a

(a)current controlled resistor

(b)voltage controlled resistor

(c)both current controlled and voltage
controlled resistor

(d)none of the above

Ans.

(c)both current controlled and voltage
controlled resistor

Q.14. A delta circuit has each element of value R/2. The equivalent element of star circuit with be

(a)R/6

(b)R/3

(c)2R

(d)3R

Ans.

(b)R/3

Q.15. The superposition theorem required as many circuits to be solved as there are

(a)sources, nodes and meshes

(b)sources and nodes

(c)sources

(d)nodes

Ans.

(c)sources



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