Why are inductance and capacitance not relevant in a dc circuit?
Because it is a simple circuit
Because dc circuits require only resistance as load
Because they do not exist in a dc circuit
Because frequency of dc is zero
Correct Answer :
D. Because frequency of dc is zero
Related Questions
The result of rust in electrical (wire) connection is
Inductance
Conductance
Impedance
Resistance
A 5 F capacitor charge to 5V has a stored charge equal to
1 c
5 c
25 C
200 c
In a complex number 5 + j 10a 10 is called ___ part.
Imaginary
Real
Conjugate
Integer
The potential gradient in a cable is maximum in
Conductor
Outer sheath
Insulation
Uniformly all over
The current is ____ times the maximum current at half-power points of a resonance curve.
The charge in the capacitor is stored at the
Terminals
Plates
Dielectric
Air
What is the specific resistance of a pure germanium?
55 -cm
55 -m
55 -mm
55 k -m
And ideal current source has an internal conductance of _____ siem
Infinite
One
Zero
One million
The temperature-resistance coefficient of pure gold is
What is a rotating vector whose projection can represent either current or voltage in an ac circuit?
Polar diagram
Scalar quantity
Velocity
Phasor
The curve between current and frequency is termed as
Voltage curve
Gain curve
Power curve
Resonance curve
In an RL series circuita
Current lags voltage by less than 90�
Current lags voltage by 180�
Current lags voltage by 90�
Current leads voltage by 90�
In calculating maximum instantaneous power ___ voltage or current is used.
Peak
Average
Rms
Instantaneous
Which waveform in which the rms value and the mean value are equal?
Square wave
Triangular wave
Sine wave
Sawtooth
When capacitors are connected in parallela the total capacitance is
Greater than the largest capacitor
Smaller than the largest capacitor
Smaller than the smallest capacitor
Greater than the smallest capacitor
An inductor carries 2 A dc. If its inductance is 100 Ha then what is its inductive reactance?
Zero
1.3 k
Which of the following elements is active?
Resistor
Inductor
Capacitor
Ideal voltage source
Which of the following dielectric materials makes the highest-capacitance capacitor?
Air
Barium-strontium titanite
Mica
Electrolyte
Electric energy refers to
Volt divided by coulomb
Voltampere
Volt-coulomb
Watt divided by time
Another term of the quality factor of the resonant circuit.
Figure of merit
Figure of demerit
Noise factor
Noise figure
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
Thevenin�s theorem is what form of an equivalent circuit?
Current
Voltage
Both current and voltage
Neither current nor voltage
For a linear circuita ___ voltage or current is used to calculate average power.
Rms
Peak
Average
Instantaneous
For a triangular and sawtooth waveform the rms voltage or current equals
0.707times peak value
0.577 times peak value
0.577times average value
0.707times rms value
The electric field strength between capacitor plates has a unit
Volts per meter
Volts per mil
Amperes per meter
Amperes per mil
The internal resistance of an ideal voltage source is
Infinite
Equal to the load resistance
Zero
To be determined
Which of the following is the peakiest?
Square wave
Sinusoidal wave
Triangular wave
Rectangular wave
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
For a parallel ACcircuita ___ is used as a reference phasor.
Voltage
Power
Current
Resistance
In an ac wavea 30 degrees of phase is ___ of a cycle.
½