Which of the following does not generally affect the value of a capacitor?
The dielectric material used
The surface area of the plates
The thickness of the dielectric
The voltage applied to the plate
Correct Answer :
D. The voltage applied to the plate
Related Questions
Series resonant circuit is sometimes known as
Rejector circuit
Acceptor circuit
Inductive circuit
Capacitive circuit
The curve between current and frequency is termed as
Voltage curve
Gain curve
Power curve
Resonance curve
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
The mutual inductance between two coils is ___ the reluctance of magnetic path.
Directly proportional to
Inversely proportional to
Independent to
Equal to
Effects of capacitance
It opposes any change in the amount of voltage
Voltage is lagged behind the current by a quarter cycle
Electric energy is stored in the capacitor in the form of electrostatic field
All of the above
If the output resistance of a voltage source is 4 a it internal resistance should be
Infinite
For a series ACcircuita ___ is not used as a reference phasor.
Voltage
Impedance
Current
Conductance
With double the number of turns by the same length and areaa the inductance is
The same
Doubled
Quartered
Quadrupled
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
In a series RLCcircuit
The current lags VLby 90�
The current leads VLby 90�
XL leads Xcby 90�
Z = jXL at resonance
Which is considered as the effect of a dielectric material?
Increasing capacitance
Decreasing capacitance
Reducing the working voltage
Increasing the distance between the plates
When the temperature of copper wire is increased its resistance is
Increased
Decreased
Constant
Zero
The maximum power transfer theorem is used in
Power system
Electronic system
Refrigeration
Air conditioning
Which of the following is a common material used in wire-wound resistors?
Manganin
Carbon
Bronze
German silver wire
If a multiplate capacitor has 10 platesa each of area 10 cm2a then
10 capacitors will be in parallel
10 capacitors will be in series
9 capacitors will be in parallel
9 capacitors will be in series
The reactance curve is a plot of frequency versus _____ for a series RLCcircuit
Current
Voltage
Gain
Impedance
What is the hot resistance of a 100 Wa 220 V incandescent lamp?
Liquids that are good conductors because of ionization are called
Electrolytic
Bases
Acid
Electrolytes
The open-circuit voltage at the terminal of load RL is 60V. Under the condition of maximum power transfera the load voltage will be
60 V
15 V
20 V
30 V
Which of the statements below is not true?
Current source is an active element
Resistor is a linear element
Voltage source is a passive element
Diode is a non-linear element
Electric energy refers to
Volt divided by coulomb
Voltampere
Volt-coulomb
Watt divided by time
Voltage resonance means
Series resonance
Parallel resonance
Current magnification
Gain magnification
The rms value of a triangular or sawtooth waveform is ___ tim value.
An ac series circuit is composed of a resistance of 20 a inductive reactance of 40 a and a capacitive reactance of 15 . If a current of 1 ampere is flowinga what is the applied voltage
320 V
32 V
220 V
22 V
At what frequency will an inductor of 5mH have the same reactance as a capacitor of 0.1 F?
7.12 kHz
7.12 Hz
7.12MHz
7.12 GHz
Which waveform in which the rms value and the mean value are equal?
Square wave
Triangular wave
Sine wave
Sawtooth
For a parallel ACcircuita ___ is used as a reference phasor.
Voltage
Power
Current
Resistance
In a parallel bank with unequal branch resistances
The highest R has the highest I
The lowest R has the highest V
The lowest R has the highest V
The highest R has the highest V
Resistor with colored bands in the body
Wire-wound resistor
Carbon-composition resistor
Potentiometer
Rheostat
What does a capacitor store?
Voltage
Charge
Current
Power