Electric Circuits Objective Questions
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To neglect a voltage source, the terminals across the source are
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Which quantity consists of a unit 1KWh ?
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Active element of electrical circuit is
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With some initial change at t = 0+, a capacitot will act as
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Which of following statements is incorrect?
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The basic circuit elements are
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The resistivity of the conductor depends on
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For a voltage source
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Constant voltage source is
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A practical current source is represented by
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A star connected load has three equal impedance each of (40 + j30) Î© If the line current is 5 A then value of line voltage is
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For determining the polarity of the voltage drop across a resistor, it is necessary to know the
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If a circuit does not contain any source of energy or emf, it is known as
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A network consists of linear resistors and ideal voltage source. If the value of resistors are doubled, then voltage across each resistor is
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How many coulombs of charge flow through a circuit carrying a current of 10 A in 1 minute?
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Internal resistance of ideal voltage source is
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i) In star connection line current is equal to phase current. ii) In delta connection line voltage is equal to phase voltage. For a given phase connected to the particular line which of the statement is true ?
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1 F is theoretically equal to
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Which quantity should be measured by the voltmeter ?
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An ideal constant voltage source has _______________ internal impedance whereas a constant source has ____________ internal impedance.
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Ideal current source have
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Current source has internal impedance connected in parallel with it whereas voltage source has internal impedance connected in __________________ with it.
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A balanced star connected load with impedance of 30j  300 Î© is supplied from a 3  phase, 4wire, 173 V system, the voltages to neutral being 100j 900, 100j  300 and 100j 1500 V. The current in neutral wire is
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The resistance of a strip of copper of rectangular cross section is 2 Î©. A metal of resistivity twice that of a copper is coated on its upper surface to a thickness equal to that of copper strip. The resistance of composite strip will be
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A network contains linear resistors and ideal voltage source s. If values of all the resistors are doubled, then voltage across each resistor is
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Super position theorem is not applicable for
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The minimum requirement for causing flow of electric current flow
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An ideal voltage source should have
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Nodal analysis can be applied for
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A dependent source
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