What is the reading of an ohmmeter for a shorted capacitor?
Zero
Infinity
k
M
Correct Answer :
A. Zero
Related Questions
An electric circuit contains
Passive elements
Active elements
Both active and passive elements
Reactive elements
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
The charge in the capacitor is stored at the
Terminals
Plates
Dielectric
Air
What refers to such work at very low temperaturesa near absolute zero?
Cryogenics
Superconductivity
Subsonic
Thermionic
An inductive load always has a ___ power factor
Leading
Lagging
Zero
Unity
In a pure capacitancea
Current leads voltage by 90�
Current leads voltage by 180�
Current lags voltage by 90�
Current lags voltage by 180�
Which of the following is a preferred resistor value?
43a000
54a321
Parallel resonant circuit is sometimes called as
Acceptor circuit
Rejector circuit
Inductive circuit
Capacitive circuit
What is the total capacitance of 10 capacitorsa each of 20 F in series?
200 F
2 F
100 F
0.5 F
Which of the following materials has the lowest dielectric strength?
Glass
Paper
Mica
Teflon
An intermittent and non-symmetrical alternating current like that obtained from the secondary winding of an induction coil
Faradic current
Transient ac current
Inductive current
Capacitive current
A series RLCcircuit has a ______ power factor at its half-power points
Unity
Leading
Lagging
Either B or C
For a linear circuita ___ voltage or current is used to calculate average power.
Rms
Peak
Average
Instantaneous
Under the conditions of maximum power transfera a voltage source is delivering a power of 15 W to the load. What is the power generated by the source?
60 W
30 W
15 W
4 W
The temperature coefficient of resistance of electrolytes is
Negative
Positive
Zero
Infinite
Voltage resonance means
Series resonance
Parallel resonance
Current magnification
Gain magnification
The mutual inductance between two coils is ___ the reluctance of magnetic path.
Directly proportional to
Inversely proportional to
Independent to
Equal to
Which of the following is not considered a physical factor affecting resistance?
Length
Material type
Temperature
Cross-sectional
If the output resistance of a voltage source is 4 a it internal resistance should be
Infinite
Refers to the outward-curving distortion of the lines of force near the edges of two parallel metal plates that form a capacitor.
Skin effect
Night effect
Edge effect
Hall effect
What is the rms value of a square wave?
Equals its peak value
Equals its peak-to-peak value
Peak divided by square root of two
Peak divided by pi
The usual load of a dc circuit is a/an
Resistor
Capacitor
Inductor
Both inductor and capacitor
The Q-factor of a parallel resonant circuit is also known as
Current magnification factor
Voltage magnification factor
Load factor
Leakage factor
Which of the following is the peakiest?
Square wave
Sinusoidal wave
Triangular wave
Rectangular wave
Inductive reactance applies only to sine waves because it
Increases with lower frequencies
Increases with lower inductance
Depends on the factor 2
Decreases with higher frequencies
Property of an electric circuit that dissipates electric energy
Reactance
Impedance
Resistance
Conductance
An inductance of 1 mH is
0.001 H
0.01 H
0.0001 H
0.10 H
When two in-phase sine waves that have identical frequency and amplitude are added togethera then the result is a sine wave with ___ the amplitude of either.
Half
Twice
Four times
One-fourth
A wire of one kilometre length has a resistance of 20 . If the length is halveda then the new resistance is ___ the original resistance.
Half
Twice
One-fourth
Three times
The Q-factor of a series resonant circuit is also known as
Current magnification factor
Voltage magnification factor
Load factor
Leakage factor