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
One-half
One-fourth
Two times
Four times
Correct Answer :
D. Four times
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Effects produced
Magnetic shock
Flashing
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Greater electrical power saving
Power loss is minimum
Appliances have different current ratings
All of the above
A 0.09 microfarad capacitor is charged to 220 volts. How long in milliseconds will it discharged resistor has a resistance of 20a000 ohms?
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CV2
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Sine wave
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Current leads voltage by 180�
Current lags voltage by 90�
Current lags voltage by 180�
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A wave with half the amplitude
Zero signal
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In a multiple capacitora the plate area is
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The same
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0.3 S
3.33 S
0.33 S
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AV
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Inductance
Capacitance
Resistance
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Quadrature component only
Complex component
In-phase component
Real component
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CV2/2
2Q2/C
C2/V
CV
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10.1 kHz
10.1 MHz
101 MHz
101 kHz
When the movable plates of a gang capacitor completely overlap the fixed platesa the capacitance of the capacitor is
Halfway between maximum and minimum
Maximum
Minimum
Zero
In an ac circuit with inductive reactance ?, the
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Current through the inductance lags its induced voltage by 90�
Current through the inductance and voltage across it are180� outof-phase
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Natural
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Unity
Leading
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Wattage
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Voltage
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Z = jXL
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The magnitude of Z is
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Increases four times
Decreases two times
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Infinite resistance and zero inductance
Infinite resistance and infinite inductance
Zero resistance and zero inductance