Which of the following is not a factor affecting dielectric strength?
Mass
Moisture content
Temperature
Thickness
Correct Answer :
A. Mass
Related Questions
What is the other name of relative permittivity?
Dielectric strength
Potential gradient
Breakdown voltage
Specific inductance capacity
Electron flow assumes charges flow from
Negative to positive
Negative to negative
Positive to negative
Positive to positive
Which of the following is the peakiest?
Square wave
Sinusoidal wave
Triangular wave
Rectangular wave
An inductive load always has a ___ power factor
Leading
Lagging
Zero
Unity
For a linear circuita ___ voltage or current is used to calculate average power.
Rms
Peak
Average
Instantaneous
How many coulombs are delivered by a storage battery in 25 hours if it is supplying current at the rate of 3 A?
2.592 x 105C
2.592 x 103 C
2.592 x 108 C
2.592 x 1012 C
What capacitance exists not through design but simply because two conducting surfaces are relatively close to each other?
Surge
Stray
Natural
Normal
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
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
When capacitors are connected in seriesa the total capacitance is
Smaller than the smallest capacitor
Smaller than the largest capacitor
Greater than any of the capacitor
Greater than the largest capacitor
In a rectangular wavea the peak factor is
Delta to wye or wye to delta transformation technique is applied to a ___ network.
One-terminal
Two-terminal
Three-terminal
Complex
What is the hot resistance of a 100 Wa 220 V incandescent lamp?
It is impossible to change the voltage across a capacitor instantlya as this would produce ___ current.
Infinite
Zero
Low
High
Which of the following does not refer to electrical energy?
Volt-ampere
Joule
Watt-second
Volt-coulomb
Norton�s theorem is ____ Thevenin�s theorem.
The same as
The converse of
Older that
More accurate than
Which of the following dielectric materials makes the highest-capacitance capacitor?
Air
Barium-strontium titanite
Mica
Electrolyte
A circuit whose parameters change with voltage or current.
Non-linear circuit
Linear circuit
Complex circuit
Passive circuit
The factor 0.707for converting peak to rms applies only to
Square waves
Triangle waves
Sawtooth waves
Sine waves
The distance between the capacitor plates increases two timesa then its capacitance
Increases two times
Increases four times
Decreases two times
Decreases four times
In a pure capacitancea
Current leads voltage by 90�
Current leads voltage by 180�
Current lags voltage by 90�
Current lags voltage by 180�
What is considered as the most important value of a sine wave?
Effective value
Peak value
Average value
Instantaneous value
The reason why electrical appliances are connected in parallel.
It is a simple circuit
This makes the operation of appliances independent with each other
This results in reduced power consumption
All of the above
The hot resistance of an incandescent lamp is about ___ times its cold resistance.
Which of the following dielectric materials makes the lowest-capacitance capacitor?
Paper
Mica
Air
Electrolyte
In an ac wavea 30 degrees of phase is ___ of a cycle.
½
A series-parallel combination of identical resistors will
Increase the power rating compared with one resistor alone
Increase the voltage rating compared with one resistor alone
Reduce the voltage rating compared with resistor alone
Result in an expensive circuit
The result of rust in electrical (wire) connection is
Inductance
Conductance
Impedance
Resistance
What fusion of elements is without chemical action between them?
Mixture
Compound
Alloy
Ionization
Which component opposes voltage change?
Resistor
Inductor
Capacitor
Transistor