What is the reciprocal of capacitance?
Reluctance
Susceptance
Elastance
Conductance
Correct Answer :
C. Elastance
Related Questions
A real current source has
Infinite internal resistance
Zero internal resistance
Large internal resistance
Small internal resistance
VL= VCin a series RLCcircuit when
The value of the impedance is minimum
The power factor is zero
The current leads the total voltage by 90�
The total voltage is zero
Which one of the following elements serves as a protection against overload?
Fuse
Switch
Resistor
Relay
In a complex resistance-reactance planea XLis represented
By an axis opposite the R axis
By an axis perpendicular to the XC axis
By an axis opposite the XCaxis
By an axis parallel to the R axis
An impedance given by 90 -45� is a/an ___ impedance.
Inductive
Conductive
Resistive
Capacitive
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
Which of the following is a common material used in wire-wound resistors?
Manganin
Carbon
Bronze
German silver wire
The resistance of an insulator ___ when its temperature is increased.
Decreases
Remains the same
Increases
Varies
The current is ____ times the maximum current at half-power points of a resonance curve.
In a rectangular wavea the form factor is
The temperature coefficient of resistance of electrolytes is
Negative
Positive
Zero
Infinite
Capacitance increase with
Larger plate area and less distance between plates
Larger plate area and greater distance between plates
Smaller plate area and less distance between plates
Higher values of applied voltage
In a circuita a passive element is one which
Supplies energy
Receives energy
Both supplies and receives energy
Attenuates signal
An inductor carries 2 A dc. If its inductance is 100 Ha then what is its inductive reactance?
Zero
1.3 k
An open resistor when checked with an ohmmeter reads
Zero
Infinite
High but within the tolerance
Low but not zero
Which of the following is the statement of Ohm�s law?
Electric current is directly proportional to both voltage and resistance
Electric current varies directly as the voltage and inversely as the resistance
Electrical power is directly proportional to the resistance and inversely as the current squared
Electrical power is directly proportional to both voltage squared and the resistance
What theorem is usually used in the analysis of transistor circuit?
Superposition theorem
Millman�s theorem
Thevenin�s theorem
Norton�s theorem
Thevenin�s theorem is what form of an equivalent circuit?
Current
Voltage
Both current and voltage
Neither current nor voltage
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
Kirchhoff�s laws (KCL and KVL) are applicable to
DCcircuits
ACcircuits
DC as well as AC circuits
Passive networks alone
Loop currents should be assumed to flow in which direction
Straight
Clockwise
Counter-clockwise
Either B or C arbitrarily selected
The unit of elastance is
Farad
Daraf
Siemen
Henry
If two complex conjugates are addeda ___ components results.
In-phase
Quadrature
Complex
Outof-phase
If resonant frequency is 10 kHz and quality factor is 50a then
Bandwidth is 200 Hz
XL= is 50a000
R is 50
XC= is 50a000
A capacitive load always has a ______ power facto
Leading
Lagging
Zero
Unity
In an ac circuit with inductive reactance ?, the
Phase angle of the circuit is always 45�
Voltage across the inductance must be 90� out o f-phase witht he applied voltage
Current through the inductance lags its induced voltage by 90�
Current through the inductance and voltage across it are180� outof-phase
The second strip of an electronic resistor color-code represents
The multiplier
The second digit of the value
The temperature
The tolerance
What is the total capacitance of 10 capacitorsa each of 20 F in series?
200 F
2 F
100 F
0.5 F
In an ac circuit with a resistive branch and an inductive branch in parallela the
Voltage across the inductance leads the voltage across the resistance by 90°
Resistive branch current is 90° out of phase with the inductive branch current
Resistive and inductive branch currents have the same phase
Resistive and inductive branch currents are 180° outof-phase
For multi-plate capacitora capacitance is proportional to
Number of plates less one(n ± 1)
Number of plates plus one(n + 1)
Number of plates less two(n - 2)
Number of plates (n)