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.f. in the circuit
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Thevenin resistance Rth is found
A. By removing voltage sources along with their internal resistances
B. By short circuiting the given two terminals
C. Between any two open terminals
D. Between same short terminals as for Eth
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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 in proportion to load
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Kirchhoff’s law is applicable to
A. Passive networks only
B. A.C. circuits only
C. D.C. circuits only
D. Both A.C. as well D.C. circuits
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A star circuit has element of resistance 2 R . The equivalent delta elements will be
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Millman’s theorem yields
A. Equivalent resistance
B. Equivalent impedance
C. Equivalent voltage source
D. Equivalent voltage or current source
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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
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A nonlinear network does not satisfy
A. Superposition condition
B. Homogeneity condition
C. Both homogeneity as well as superposition condition
D. Homogeneity, superposition and associative condition
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Which of the following is non-linear circuit parameter?
A. Inductance
B. Condenser
C. Wire wound resistor
D. Transistor
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Efficiency of power transfer when maximum transfer of power c xerosis
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The superposition theorem is applicable to
A. Linear, nonlinear and time variant responses
B. Linear and nonlinear resistors only
C. Linear responses only
D. None of the above
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Kirchhoff 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 current can leave the junction without some current entering it
D. Total sum of currents meeting at the junction is zero
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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. Parallel with the voltage source
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This mention statement is associated with “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 currents (the number being equal to the number of sources of e.m.f.), each of which is due to separate action of each source of e.m.f., taken order, when the remaining sources of e.m.f. are replaced by conductors, the resistances of which are equal to the internal resistances of the respective sources”.
A. Thevenin’s theorem
B. Norton’s theorem
C. Superposition theorem
D. None of the above
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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
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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
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If the energy is supplied from a source, whose resistance is 1 ohm, to a load of 100 ohms the source will be
A. A voltage source
B. A current source
C. Both of above
D. None of the above
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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 all 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 all independent current sources are open circuited
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If resistance across LM in Fig. 2.30 is 15 ohms, the value of R is
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This mention statement is associated with “Any number of current sources in parallel may be replaced by a single current source whose current is the algebraic sum of individual currents and source resistance is the parallel combination of individual source resistances”.
A. Thevenin’s theorem
B. Millman’s theorem
C. Maximum power transfer theorem
D. None of the above
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