R.K. Rajput SET-2

(1):-kirchoff's current law states that
(a) net current flow at the junction is positive
(b) algebraic sum of the currents meeting at the junction is zero
(c) no currents can leave the junction without some current entering it.
(d) totaal sum of currents meeting at the junction is zero

(2):-According to kirchoff's 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

(3):-Kirchoff's current law is applicable to only
(a) junction in a network
(b) closed loops in a network
(c) electric circuit
(d) electronic circuit

(4):-Kirchoff's voltage is applicable to only
(a)junction currents
(b) battery e.m.fs.
(c) IR drops
(d) both (b) and (c)
(d) none of the above

(5):-Supperposition theorem can be applied only to circuit having
(a) resistive elements
(b) passive elements
(c) non-linear elements
(d) linear bilateral elements

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

(7):-thevenin resistance Rth is found
(a) by removing voltage source along with their internal resistance
(b) by short-circuiting the given two terminals
(c) between any two 'open' terminals
(d) between same open terminals as for Eth

(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

(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 nsource e.m.f. and terminal voltage are equal
(d) none of the above

(10):-To determine the polarity of the voltage drop across a resistor, it is necessery to know
(a) the value of current throw the resistor
(b) direction of current throw the resistor
(c) value of resistor
(d) e.m.f. in the circuit

(11):-The thevenin's equivalent between point L and M for the network shown in fig. 2.22 is given by
(a) 5V, 0ohm
(b) 5V, 5ohm
(c) 5V, 10ohm
(d) none of the above

(12):-The equivalent resistor between point L to M in the network shown in fig. 2.23 is given by
(a) 2ohms
(b) 4ohms
(c) 6ohms
(d) 8ohms

(13):-"Maximum power output is obtained from a network when the load resistance is equal to the output resistance of the network as seen from the terminals of the load." The above statement is associated with
(a) Millman's theorem
(b)Thevenin's theorem
(c) Superposition theorem
(d) Maximum power tronsfer theorem

(14):-"Any number of current source in parallel may be replaced by a single single current source whose current is the algebriac sum of individual source resistances".
(a) Thevenin's theorem
(b) Millman's theorem
(c) Maximum power transfer theorem
(d) none of the above

(15):-"In any linear bilateral network, if a source of e.m.f. E in any other branch, then same e.m.f. acting in the second branch would produce the same currentI in the first branch".
(a) compensation theorem
(b) superposition theorem
(c) reciprocity theorem
(d) none of the above

(16):-in the circuit shown in fig. 2.24, Rth equals
(a) R3+(R1*R2)/R1+R2
(b) R1+(R2*R3)/R2+R3
(c) R2+(R3*R1)/R3+R1
(d) none of the above

(17):-Thevenin's equivalent (Eth, Rth) for the circuit shown in fig. 2.25 will be
(a) 16.5V, 6ohm
(b) 12.5V, 3ohm
(c) 10.5V, 2ohm
(d) 7.5V, 1.5ohm

(18):-Thevenin's equivalent (Eth, Rth) for the circuit shown in fig. 2.26 will be
(a) 20V, 5.6ohm
(b) 18V, 4ohm
(c) 16V, 4ohm
(d) 12V, 2ohm

(19):- The current drawn from 4V battery in the network shown in fig. 2.27 will be
(a) 1.4A
(b) 0.9A
(c) 0.6A
(d) 0.39A

(20):-Using thevenin's theorem, the current in branch of NS of the network shown in fig. 2.28 will be
(a) 3.7A
(b) 2.7A
(c) 1.6A
(d) 0.6A

(21):-Which of the following is non-linear circuit parameter?
(a) inductance
(b) condenser
(c) wire wound resistor
(d) transistor

(22):-A capacitor is generally a
(a) bilateral and active component
(b) active, passive, linear and non-linear component
(c) linear and bilateral component
(d) non-linear and active component

(23):-"In any network containing more than one sources of e.m.f. the current in any branch is the algebraic sum of a number of individual fictious currents(the number being to the number of sources of e.m.f.), each of which is due to seperate action of each sources of e.m.f., taken in order, when the remaining source of e.m.f. are replaced by conductors, the resistance of which are equal to the internal resistances of the respective sources". The above statement is associated with
(a) Thevenin's theorem
(b) norten's theorem
(c) superposition theorem
(d) none of the above

(24):-In a delta network each element has value R. The value of each element in equivalent star network will be
(a) R/6
(b) R/4
(c) R/2
(d) R/3

(25):-Kirchoff's law is applicable to
(a) ssive network only
(b) a.c. circuit only
(c) d.c. circuit only
(d) both a.c. as well as d.c. circuit

(26):-Kirchof's law is not applicable to circuit with
(a) lumped parameters
(b) passive elements
(c) distrobuted parameters
(d) non-linear resistances

(27):-Kirchof's voltage law applies to circuit with
(a) non-linear element only
(b) linear elements only
(c) linear, non-linear, active and passive elements
(d) linear, non-linear, active, passive, time varrying as wells as time invarient elements

(28):-The resistance LM will be
(a) 6.66ohm
(b) 12ohm
(c) 18ohm
(d) 20ohm

(29):-For high efficiency of transformer of power, internal resistance of the source should be
(a) equal to the load resistance
(b) less than the load resistance
(c) more than the load resistance
(d) noneof the above

(30):-Efficiency of power transfer when maximum transfer of power occurs is
(a) 100%
(b) 80%
(c) 75%
(d) 50%

(31):-If resistance across LM in fig. 2.30 is 15ohms, the value of R is
(a) 10ohm
(b) 20ohm
(c) 30ohm
(d) 40ohm

(32):-For maximum transfer of power, internal resistance of the source should be
(a) equal to load resistance
(b) less to load resistance
(c) greater to load resistance
(d) none of the above

(33):-If the energy is supplied from the source, whose resistance is 1ohm, to a load of 100ohms the source will be
(a) a voltage source
(b) a current source
(c) both of above
(d) none of the above

(34):-The circuit whose properties are same in either direction is known as
(a) unilateral circuit
(b) bilateral circuit
(c) irreversible circuit
(d) reversible circuit

(35):-In a series parallel circuit, any two resistances in the same current path must be in
(a) series with each other
(b) parallel with each other
(c) series with the voltage source
(d)

(36):-In the given circuit, the kirchoff's current law at the point L is applied. Which of the following statement is correct?
(a) i1-(i2+i3)=0
(b) i1=i2-i3
(c) i1+i2-i3=0
(d) i1+i2+i3=0

(37):-If a circuit does not contain any source of energy or e.m.f. it is known as
(a) unilateral circuit
(b) bilateral circuit
(c) passive network
(d) active network

(38):-The resistance between point A and B (fig. 2.32) is
(a) 4ohm
(b) 6ohm
(c) 8ohm
(d) 12ohm

(39):-The circuit parameter may be
(i) active (ii) passive
(iii) linear (iv) non-linear
(a) (i) and (ii)
(b) (i) and (iv)
(c) (ii) and (iv)
(d) (ii) and (iii)

(40):-Which of the following is linear and bilateral parameter?
(a) resistors
(b) semi-conductor diodes
(c) electron tubes
(d) transistor

(41):-The common voltage across parallel branches with different voltage sources can be determined by the relation
V=(V1/R1+V2/R2+V3/R3)/1/R1+1/R2+1/R3
The above statement is associated with
(a) superposition theorem
(b) Thevenin's theorem
(c) Norten's theorem
(d) Millman's theorem

(42):-For the circuit shown in fig. 2.33 the current through R2 will be
(a) 2.5A
(b) 3.5A
(c) 4.5A
(d) 5.5A

(43):-The circuit has resistor, capacitors and semi-conductor diode. The circuiy will be known as
(a) non-linear circuit
(b) linear circuit
(c) bilateral circuit
(d) none of the above

(44):-A non-linear network does not satisfy
(a) superposition condition
(b) homogeneity condition
(c) both homogeneity as well as suoperposition condition
(d) homogeneity, superposition and associative condition

(45):-An ideal voltage source has
(a) zero internal resistance
(b) open circuit voltage equal to the voltage on full load
(c) terminal voltage in proportion to current
(d) terminal voltage inproportion to load

(46):-A network which contains one or more than one source of e.m.f. in known as
(a) linear network
(b) non-linear network
(c) passive network
(d) active network

(47):-The superposition theorem is applicable to
(a) linear, non-linear and time variant responses
(b) linear and non-linear resistors only
(c) linear responses only
(d) nonof the above

(48):-Which of the following is not a non-linear element?
(a) gas diode
(b) heater coil
(c) tunnel diode
(d) electric arc

(49):-Application of norten's theorem to the circuit yields
(a) equivalent current source and impedence in series
(b) equivalent current source and impedence in parallel
(c) equivalent impedence
(d) eqquivalent current source

(50):-Millman's theorem yields
(a) equivalent resistance
(b) equivalent impedence
(c) equivalent voltage source
(d) equivalent voltage or current source

(51):-The superposition theorem is applicable to
(a) voltage only
(b) current only
(c) both current and voltage
(d) current voltage and power

(52):-Between the branch voltages of a loop the kirchaff's voltage law imposes
(a) non-linear constraints
(b) linear constraints
(c) no constraints
(d) none of the above

(53):-A passive network is one which contains
(a) only variable resistances
(b) only some sources of e.m.f. in it
(c) only two sources of e.m.f. in it
(d) no source of e.m.f. in it

(54):-A terminals where three on more branches meet is known as
(a) node
(b) terminus
(c) combination
(d) anode

(55):-Which of the following is the passive element?
(a) capacitance
(b) ideal current source
(c) ideal voltage source
(d) all of the above

(56):-Which of the following is a bilateral element?
(a) constant current source
(b) constant voltage source
(c) capacitance
(d) none of the above

(57):-a closed path made by several branches of the network is known as
(a) branch
(b) loop
(c) circuit
(d) junction

(58):-A linear resistor having 0 less than R less than infinite is a
(a) current controlled resistor
(b) voltage controlled resistor
(c) both current controlled and voltage controlled resistor
(d) none of the above

(59):-A star circuit has element of resistance R/2. The equivalent delta elements will be
(a) R/6
(b) 3/2R
(c) 2R
(d) 3R

(60):-A delta circuit has each element of value R/2. The equivalents of star circuit with be
(a) R/6
(b) R/3
(c) 2R
(d) 3R

(61):-In Thevenin's theorem, to find Z
(a) all independent current sources are short circuited and independent voltage sources are open circuited
(b) all independent voltage sources are open circuited and independent current sources are short circuited
(c) all independent voltage and current sources are short circuited
(d) all independent voltage sources are short circuited and independent current sources are open circuited

(62):-While calculating Rth in thevenin's theorem and norton equivalent
(a) all independent sources are made dead
(b) only current sources are made dead
(c) only voltage sources are made dead
(d) all voltage and current sources are made dead

(63):-The number of independent equations to solve a network is equal to
(a) the number of chord
(b) the number of branches
(c) sum of the number of branches and chord
(d) sum of number of branches, chord and nodes

(64):-The superposition theorem requires as many circuits to be solved as there are
(a) sources, nodes and meshes
(b) sources and nodes
(c) sources
(d) nodes

(65):-Choose the incorrect statement.
(a) A branch formed by the parallel connection of any resistor R and open circuit has the characteristic of an open circuit.
(b) A branch formed by the parallel connection of any resistor R and short circuit has the characteristic of a short circuit.
(c) A branch formed by the series connection of any resistor R and an open circuit has the charecteristic of an open circuit.
(d) A branch formed by the series connection of any resistor R and short circuit has the charecteristic of resiostor R.