Saturday, 6 October 2012

Network Theorems - electrical multiple choice questions and answers pdf



1.   Kirchhoff s current law states that
(a) net current flow at the junction is positive
(b) Hebraic sum of the currents meeting at the junction is zero
(c) no curreht can leave the junction without some current entering it.
(d) total sum of currents meeting at the junction is zero

Ans: b

2. According to Kirchhoffs voltage law, the algebraic sum of all IR drops and e.m.fs. in any closed loop of a network is always
(a)     negative
(b)     positive
(c) determined by battery e.m.fs.
(d) zero

Ans: d

3. Kirchhoffs 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


4. Kirchhoffs voltage law is related to
(a) junction currents
(b) battery e.m.fs.
(c)     IR drops
(d) both (b) and (c)
(e) none of the above

Ans: d


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

6. The concept on which Superposition theorem is based is
(a) reciprocity
(b) duality
(c) non-linearity  
(d) linearity
Ans: d

7. Thevenin resistance Rth is found
(a) by removing voltage sources along with their internal resistances
(6)     by short-circuiting the given two terminals
(c) between any two 'open' terminals
(d) between same open terminals as for Etk
Ans: d

8. 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

9. 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 voltage are equal
Ans: b

10. 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

Read More Network Theorems Questions and Answers => Click Here

8 comments:

bimal* said...

Sir kindly make me clear in question(no.21 and 24) and also in (31 and 35)these question are confusing...

Anonymous said...

good

Yogendra chaudhary on 30 April 2015 at 23:01 said...

21-b ,24- b 31-d

*b 19.05.2015 said...

Thanks .....Yogendra but i think 21-a 24-a and 31-d as per max trnsf theoram.

bim... said...

thanks sir

Anonymous said...

34 b

Anonymous said...

thanks :)

Anonymous said...

millman s theorem is not applicable for current source , its convert first than apply,
35 option is may be wrong

maximum power transfer theorem is given by thevnins theorem , and \\

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