In a complex number 5 + j 10a 10 is called ___ part.
Imaginary
Real
Conjugate
Integer
Correct Answer :
A. Imaginary
Related Questions
Series resonant circuit is sometimes known as
Rejector circuit
Acceptor circuit
Inductive circuit
Capacitive circuit
A capacitor of 0.5 F charged to 220 V is connected across an uncharged 0.5 F capacitor. What is the voltage across each capacitor?
220 V
150 V
110 V
22 V
An intermittent and non-symmetrical alternating current like that obtained from the secondary winding of an induction coil
Faradic current
Transient ac current
Inductive current
Capacitive current
The capacitance of a capacitor is ___ relative permittivity.
Directly proportional to
Inversely proportional to
Equal to
Inversely proportional to the square of
For parallel 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
Refers specifically to steady state values of quantities in ac circuits which are complex numbers.
Domain
Scalar quantity
Vector quantity
Phasor quantity
What is the efficiency under the conditions of maximum power transfer?
A 5 F capacitor charge to 5V has a stored charge equal to
1 c
5 c
25 C
200 c
A neon glow lamp used as a night light ionizes at approximately
70 V
80 V
90 V
100 V
Points to be considered in choosing a capacitor
Working voltage
Type of dielectric
Capacitance
All of the above
The unit of elastance is
Farad
Daraf
Siemen
Henry
What is the rms value of a square wave?
Equals its peak value
Equals its peak-to-peak value
Peak divided by square root of two
Peak divided by pi
The Q-factor of a series resonant circuit is also known as
Current magnification factor
Voltage magnification factor
Load factor
Leakage factor
When the power factor of a circuit is zeroa
Power absorbed is maximum
Power absorbed is minimum
Power absorbed is zero
The impedance is minimum
The charging of a capacitor through a resistance follows what law?
Linear law
Hyperbolic law
Inverse-square law
Exponential law
A circuit whose parameters change with voltage or current.
Non-linear circuit
Linear circuit
Complex circuit
Passive circuit
In a series circuit with unequal resistances the
Highest R has the highest V
Lowest R has the highest V
Lowest R has the highest I
Highest R has the highest I
Another term for superconductor.
Generic conductor
Ultraconductor
Cryotron
Cryogenic conductor
Barium-strontium titanite dielectric material is also called
Ceramic
Polyster
Electrolytic
Bakelite
What is the temperature coefficient of the resistance Eureka?
Infinity
Negative
Almost zero
Positive
Resistor with colored bands in the body
Wire-wound resistor
Carbon-composition resistor
Potentiometer
Rheostat
An inductive load always has a ___ power factor
Leading
Lagging
Zero
Unity
Permeability is otherwise known as
Magnetic conductivity
Magnetic susceptibility
Electric conductivity
Electric susceptibility
Which of the following has negative temperature coefficient?
Carbon
Nickel
Brass
Constantan
In dividing or multiplying phasor quantitiesa ___ form is used.
Polar
Rectangular
Trigonometric
Exponential
The resistance of an insulator ___ when its temperature is increased.
Decreases
Remains the same
Increases
Varies
The symbol Q refers to
Resonance quotient
Quality factor
Power quotient
Qualification test
For greater accuracya the value of phase angle should be determined from
Cos
Tan
Sin
Sec
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
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