The voltage lags the current by cycle in a
Purely resistive circuit
Purely inductive circuit
Purely capacitive circuit
Circuit containing resistancea capacitance and inductance
Correct Answer :
C. Purely capacitive circuit
Related Questions
And ideal current source has an internal conductance of _____ siem
Infinite
One
Zero
One million
In liquids and gasesa ionization current results from a flow of
Positive or negative ions
Free electrons
Ions that are lighter in weight than electrons
Protons
Rationalizing the denominator of a complex number means
Eliminating the j component in the denominator
Adding j component in the denominator
Eliminating the j component in the numerator
Adding j component in the numerator
An open inductor has
Zero resistance and infinite inductance
Infinite resistance and zero inductance
Infinite resistance and infinite inductance
Zero resistance and zero inductance
Barium-strontium titanite dielectric material is also called
Ceramic
Polyster
Electrolytic
Bakelite
For greater accuracya the value of phase angle should be determined from
Cos
Tan
Sin
Sec
A trigger circuit consisting of a capacitor of 0.01 F is connected in series with a resistor. If the circuit requires 100 Vdcto operatea determine the value of the resistor when time constant is 0.009s.
900 k
900 M
900 G
What is the temperature coefficient of the resistance Eureka?
Infinity
Negative
Almost zero
Positive
With double the number of turns by the same length and areaa the inductance is
The same
Doubled
Quartered
Quadrupled
What is the most common non-sinusoidal waveform?
Square wave
Triangular wave
Trapezoidal wave
Sawtooth wave
In a series RLCcircuit
Increasing the frequency decreases the resistance
Increasing the frequency increases the resistance
Both XLand XCchange as frequency changes
Impedance will always decrease
What maximum voltage can be applied across the capacitor of time?
Working voltage
Surge voltage
Stray voltage
Peak voltage
What value of R is needed with a 0.05 F Cfor an RCtime constant of 0.02 s?
400 M
400 G
400 k
Transient period is considered over after
The charging of a capacitor through a resistance follows what law?
Linear law
Hyperbolic law
Inverse-square law
Exponential law
Points to be considered in choosing a capacitor
Working voltage
Type of dielectric
Capacitance
All of the above
The arc across a switch when it open an RL circuit is a result of the
Large self-induced voltage across L
Long time constant
Low resistance of the open switch
Surge of resistance
The area of capacitor plates increases two timesa then its capacitance
Increases two times
Increases four times
Decreases two times
Decreases four times
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
What is the total effective capacitance of two 0.25 F capacitors connected in series?
0.125 F
1.25 F
0.50 F
2.5 if
What is the specific resistance of a pure silicon?
55 -mm
55 -m
55 -cm
55 k -m
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
Permeability is otherwise known as
Magnetic conductivity
Magnetic susceptibility
Electric conductivity
Electric susceptibility
The charging of a capacitor through a resistance obeys
Exponential law
Logarithmic law
Linear law
Square law
A lead conductor has a resistance of 25 at 0 �C. Determine its resistance at -30 �C
In a rectangular wavea the peak factor is
If two complex conjugates are addeda ___ components results.
In-phase
Quadrature
Complex
Outof-phase
A switch designed to have low capacitance between its terminal when open.
LOCAP switch
AntiLOCAP switch
Anticapacitance switch
Capacitance switch
The electric field strength between capacitor plates has a unit
Volts per meter
Volts per mil
Amperes per meter
Amperes per mil
When two coils of identical reactance are in parallel without mutual inductancea the reactance of the combination is ___ the reactance of each coil.
One half
Twice
Four times
One fourth