In a rectangular wavea the form factor is
Correct Answer :
C.
Related Questions
A term used to express the amount of electrical energy stored in electrostatic field.
Joules
Coulombs
Watts
Electron-volt
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
With double the number of turns by the same length and areaa the inductance is
The same
Doubled
Quartered
Quadrupled
The factor 0.707for converting peak to rms applies only to
Square waves
Triangle waves
Sawtooth waves
Sine waves
For series capacitorsa total charge is
The sum of individual charges
Equal to the charge of either capacitors
Equal to the product of the charges
The quotient of the charges
When capacitors are connected in seriesa the total capacitance is
Smaller than the smallest capacitor
Smaller than the largest capacitor
Greater than any of the capacitor
Greater than the largest capacitor
Which of the following has a positive temperature coefficient?
Mica
Manganin
Silicon
Carbon
What is the reciprocal of quality factor?
Power factor
Reactive factor
Dissipation factor
1/Q factor
Barium-strontium titanite dielectric material is also called
Ceramic
Polyster
Electrolytic
Bakelite
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
The wavelength of an alternating waveform depends upon the ___ of the variation.
Period
Number
Frequency
Amplitude
A wire of one kilometre length has a resistance of 20 . If the length is halveda then the new resistance is ___ the original resistance.
Half
Twice
One-fourth
Three times
Another term of the quality factor of the resonant circuit.
Figure of merit
Figure of demerit
Noise factor
Noise figure
For maximum power transfera what is the relation between load resistance RL and internal resistance R of the voltage source?
RL= 2 r
RL= 1.5 r
RL= r
RL= 3 r
In a resonant circuita if Q ? 10 resonant frequency _______ bandwidth.
Bisects
Exceeds
Is less than
Is equal to
An inductive load always has a ___ power factor
Leading
Lagging
Zero
Unity
The temperature coefficient of resistance of electrolytes is
Negative
Positive
Zero
Infinite
A capacitive load always has a ______ power facto
Leading
Lagging
Zero
Unity
High resistance values are a consequence of the ___ of the film.
Thickness
Length
Thinness
Area
A real current source has
Infinite internal resistance
Zero internal resistance
Large internal resistance
Small internal resistance
The reason why electrical appliances are not connected in series.
Greater electrical power saving
Power loss is minimum
Appliances have different current ratings
All of the above
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
Which of the following has negative temperature coefficient?
Carbon
Nickel
Brass
Constantan
An alloy composed of 84 % coppera 12 % manganese and 4 % nickel.
Manganin
Constantan
Nichrome
German silver wire
Which of the following capacitors is suitable for dc filter circuits?
Mica
Ceramic
Paper
Electrolytic
A series-parallel combination of identical resistors will
Increase the power rating compared with one resistor alone
Increase the voltage rating compared with one resistor alone
Reduce the voltage rating compared with resistor alone
Result in an expensive circuit
If two equal resistances connected in series across a certain supply are now connected in parallel across the same supplya the power produced will be _____ that of series connection
One-half
One-fourth
Two times
Four times
What is the resonant frequency of a circuit when L of 25 microhenrys and C of 10 picofarads are in parallel?
10.1 kHz
10.1 MHz
101 MHz
101 kHz
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
When current and voltage arte in phase in an ac circuita the ___ is equal to zero.
Resistance
Reactance
Inductance
Capacitance