Related Questions
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A capacitor of 0.5 F charged to 220 V is connected across an uncharged 0.5 F capacitor. What is the voltage across each capacitor?
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4
An impedance given by 90 -45� is a/an ___ impedance.
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4
Which statement is true about a passive circuit?
A. A circuit with neither a source of current nor a source of potential difference
B. A circuit with a voltage source
C. A circuit with a current source
D. A circuit with only resistance as a load
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4
A lead conductor has a resistance of 25 at 0 �C. Determine its resistance at -30 �C
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4
The temperature-resistance coefficient of pure gold is
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A tank circuit is a
D. A non-resonant circuit
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In a resonant circuita if Q ? 10 resonant frequency _______ bandwidth.
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Parallel resonant circuit is sometimes called as
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When voltage is applied across a ceramic dielectric the electrostatic field p roduced is 50 times greater than air dielectric. The dielectric constant of ceramic therefore is
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4
Form its definitiona the unit of electric fielda is the N/C and equivalent unit of is the
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What is a rotating vector whose projection can represent either current or voltage in an ac circuit?
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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 is the hot resistance of a 100 Wa 220 V incandescent lamp?
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The wavelength of an alternating waveform depends upon the ___ of the variation.
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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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4
A capacitor opposes change in
D. Neither voltage nor current
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A capacitance of 6 ��F means
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The electric field strength between capacitor plates has a unit
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In calculating maximum instantaneous power ___ voltage or current is used.
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Thevenin�s theorem is what form of an equivalent circuit?
C. Both current and voltage
D. Neither current nor voltage
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What is the half-power bandwidth of a parallel resonant circuit which has a resonant frequency of 3.6 MHz and Q of 218?
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If resonant frequency is 10 kHz and quality factor is 50a then
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4
For a triangular and sawtooth waveform the rms voltage or current equals
B. 0.577 times peak value
C. 0.577times average value
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4
The arc across a switch when it open an RL circuit is a result of the
A. Large self-induced voltage across L
C. Low resistance of the open switch
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The Q-factor of a series resonant circuit is also known as
A. Current magnification factor
B. Voltage magnification factor
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In an ac circuita the power dissipated as heat depends on
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Two capacitors of capacitance 9 F and 18 F in series will have a total capacitance of
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A gang capacitor is a variable capacitor in which capacitance is varied by changing the
D. Distance between plates
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Which of the statements below is not true?
A. Current source is an active element
B. Resistor is a linear element
C. Voltage source is a passive element
D. Diode is a non-linear element
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Voltage resonance means