Related Questions
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4
Kirchhoff�s laws (KCL and KVL) are applicable to
C. DC as well as AC circuits
D. Passive networks alone
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The graph between an alternating quantity and time is called
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If the inductance is decreaseda the impedance of the circuit containing a resistor a capacitor and an inductor connected in series to an ac source
C. Decreases or increases
D. Decreasesa increases or remains the same
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4
If an emf in circuit A produces a current in circuit Ba then the same emf in circuit Bproduces the same current in circuit ? this theorem is known as
A. Maximum power transfer theorem
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In a complex number 5 + j 10a 10 is called ___ part.
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What dielectric is generally employed by a variable capacitor?
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For a parallel ACcircuita ___ is used as a reference phasor.
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As applied to a series RLCcircuita bandwidth means
A. The frequency range for maximum power transfer
B. The difference between the highest and lowest frequencies of the oscillator
C. The separation of the half-power points
D. The frequency at which XL= XC
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In a circuita an active element is one which
C. Both supplies and receives energy
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An inductor carries 2 A dc. If its inductance is 100 Ha then what is its inductive reactance?
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The second strip of an electronic resistor color-code represents
B. The second digit of the value
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Leakage resistance in a capacitor results into
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An inductive circuit of resistance 16.5 and inductance of 0.14 H takes a current of 25 ?. if the frequency is 50 Hza find the supply voltage.
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The ___ of an alternating quantity is defined as the fractional part of a period or cycle through which the quantity has advanced from selected origin.
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If two equal resistances connected in series across a certain supply are now connected in parallel across the same supplya the power produced will be _____ that of series connection
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The internal resistance of an ideal current source is
C. Equal to the load resistance
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What is the total resistance of a two equal valued resistors in series?
A. The difference of both
D. The sum of their reciprocals
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The charging of a capacitor through a resistance follows what law?
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A series RL circuit has R of 10 and XL of 5 a its impedance in rectangular form is given by
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The potential gradient in a cable is maximum in
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Which of the following has a positive temperature coefficient?
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Which of the following is a disadvantage of a wire-wound resistor?
A. It has reactance in radio-frequency circuits
B. It cannot handle much power
C. It draws a large amount of current
D. It cannot handle high voltage
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In dividing or multiplying phasor quantitiesa ___ form is used.
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The power factor of a certain circuit in which the voltage lags behind the current is 80 %. To increase the power to 100 %a it is necessary to add ___ to the circuit.
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Refers to the outward-curving distortion of the lines of force near the edges of two parallel metal plates that form a capacitor.
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A resistor wound with a wire doubled back on itself to reduce the inductance.
C. Anti-inductive resistor
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Which of the following is not a factor affecting dielectric strength?
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A neon glow lamp used as a night light ionizes at approximately
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4
The usual load of a dc circuit is a/an
D. Both inductor and capacitor
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What theorem is generally used in the analysis of vacuum tubes?