The wavelength of an alternating waveform depends upon the ___ of the variation.
Period
Number
Frequency
Amplitude
Correct Answer :
C. Frequency
Related Questions
At parallel resonancea the currents flowing through L and C are
Infinite
Zero
Unequal
Equal
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
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)
The power factor of a circuit is equal to
RZ
XC/Z
XL/Z
R/Z
Which of the following represents the energy stored in a cap
CV2/2
2Q2/C
C2/V
CV
What is the most common non-sinusoidal waveform?
Square wave
Triangular wave
Trapezoidal wave
Sawtooth wave
It is impossible to change the voltage across a capacitor instantlya as this would produce ___ current.
Infinite
Zero
Low
High
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
What is considered as the most important value of a sine wave?
Effective value
Peak value
Average value
Instantaneous value
The ratio of maximum value to the effective value of an alternating quantity is called
Form factor
Peak factor
Dynamic factor
Leakage factor
The symbol Q refers to
Resonance quotient
Quality factor
Power quotient
Qualification test
What is the cross-sectional are of a conductor whose diameter is 0.001 inch?
One micron
One angstrom
One steradian
One circular mil
The power factor of a certain circuit in which the voltage lags behind the current is 80 %. To increase the power to 100 %a it is necessary to add ___ to the circuit.
Inductance
Capacitance
Resistance
Impedance
Which of the following is the peakiest?
Square wave
Sinusoidal wave
Triangular wave
Rectangular wave
A capacitor is used to
Block dc current
Pass dc current
Open voltage source
Short the voltage source
What refers to the lowest voltage across any insulator that can cause current flow?
Conduction voltage
Critical voltage
Breakdown voltage
Voltage capacity
What is a rotating vector whose projection can represent either current or voltage in an ac circuit?
Polar diagram
Scalar quantity
Velocity
Phasor
Norton�s theorem is ____ Thevenin�s theorem.
The same as
The converse of
Older that
More accurate than
The curve between current and frequency is termed as
Voltage curve
Gain curve
Power curve
Resonance curve
Which of the following is a way of decreasing mutual inductance?
Moving the coils closer
Moving the coils apart
Decreasing the number of turns of either coil
Increasing the number of turns of either coil
What is the peak factor for alternating current or voltage varying sinusiodally?
What increases the resistance of wire at high frequencies?
Temperature
Voltage
Skin effect
Insulation
In a rectangular wavea the peak factor is
What is a closed path made of several branches of the network called?
Junction
Node
Terminal
Loop
Which of the following is not a factor affecting capacitance oor?
Area of plates
Number of plates
Distance between plates
Dielectric material used
What is the total capacitance of 10 capacitorsa each of 20 F in series?
200 F
2 F
100 F
0.5 F
Resistor with colored bands in the body
Wire-wound resistor
Carbon-composition resistor
Potentiometer
Rheostat
An inductive circuit of resistance 16.5 and inductance of 0.14 H takes a current of 25 ?. if the frequency is 50 Hza find the supply voltage.
1501 V
1174V
1877V
991 V
When current and voltage arte in phase in an ac circuita the ___ is equal to zero.
Resistance
Reactance
Inductance
Capacitance
In dividing or multiplying phasor quantitiesa ___ form is used.
Polar
Rectangular
Trigonometric
Exponential