What is the most common non-sinusoidal waveform?
Square wave
Triangular wave
Trapezoidal wave
Sawtooth wave
Correct Answer :
A. Square wave
Related Questions
If the capacitance of mica capacitor is 5 times the capacitcitora then the relative permittivity of mica is
In an inductive coila the rate of rise of current is maximum
Near the final maximum value of current
At midvalue of current
At half-power points
After one time constant
For a series ACcircuita ___ is not used as a reference phasor.
Voltage
Impedance
Current
Conductance
The Q-factor of a parallel resonant circuit is also known as
Voltage magnification factor
Current magnification factor
Gain magnification factor
Resonance magnification factor
What is the most convenient way of achieving large capacitance?
By using multiplate construction
By using air as dielectric
By decreasing distance between plates
By using dielectric of low permittivity
What is the most common non-sinusoidal waveform?
Square wave
Triangular wave
Trapezoidal wave
Sawtooth wave
The symbol Q refers to
Resonance quotient
Quality factor
Power quotient
Qualification test
The hot resistance of an incandescent lamp is about ___ times its cold resistance.
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 potential gradient in a cable is maximum in
Conductor
Outer sheath
Insulation
Uniformly all over
Which of the following is the peakiest?
Square wave
Sinusoidal wave
Triangular wave
Rectangular wave
In a series RLCcircuit
The current lags VLby 90�
The current leads VLby 90�
XL leads Xcby 90�
Z = jXL at resonance
A capacitor is basically constructed of
Two conductors separated by a dielectric
Two dielectric separated by a conductor
Conductors and dielectric
Conductors and semiconductors
When two unequal values of resistors are connected in parallel across a dc sourcea greater current flows through the
Higher resistance
Lower resistance
Higher wattage resistance
Lower wattage resistance
The voltage lags the current by cycle in a
Purely resistive circuit
Purely inductive circuit
Purely capacitive circuit
Circuit containing resistancea capacitance and inductance
If a coil has a Q of 10a it means that
The energy stored in the magnetic field of the coil is 10 times the energy wasted in its resistance
The energy wasted in its resistance is 10 times the energy stored in the magnetic field of the coil
It is a low Q coil
It is a high Q coil
If three 9 mH inductors are connected in parallel without mutual inductance then the total i nductance is
3 mH
9 mH
27mH
18 mH
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 factor 0.707for converting peak to rms applies only to
Square waves
Triangle waves
Sawtooth waves
Sine waves
Resistor with colored bands in the body
Wire-wound resistor
Carbon-composition resistor
Potentiometer
Rheostat
When current and voltage arte in phase in an ac circuita the ___ is equal to zero.
Resistance
Reactance
Inductance
Capacitance
The reciprocal of a complex number is
A complex number
A real number
An imaginary number
A whole number
Transient period is considered over after
What is the temperature coefficient of the resistance Eureka?
Infinity
Negative
Almost zero
Positive
What is the cross-sectional are of a conductor whose diameter is 0.001 inch?
One micron
One angstrom
One steradian
One circular mil
³Any resistance R in a branch of a network in which a current I is flowing can be replaced by a voltage equal to IR�. This states
Compensation theorem
Reciprocity theorem
Millman�s theorem
Superposition theorem
What does a capacitor store?
Voltage
Charge
Current
Power
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
A 0.09 microfarad capacitor is charged to 220 volts. How long in milliseconds will it discharged resistor has a resistance of 20a000 ohms?
If two resistances of 9 and 6 are connected in parallela the total resistance is