In Norton�s theorema the short circuit current is obtained by
Opening the load terminals
Shorting the load terminals
Opening the voltage source
Shorting the voltage source
Correct Answer :
B. Shorting the load terminals
Related Questions
A three-by-threea series-parallel matrix of resistorsa all having the same ohmic valuea would have a net resistance of
One-third the value of a single resistor
Three times the value of a single resistor
The same value as a single resistor
Nine times the value of a single resistor
What dielectric is generally employed by a variable capacitor?
Mica
Air
Electrolyte
Ceramic
Which of the following is a preferred resistor value?
43a000
54a321
With double the number of turns by the same length and areaa the inductance is
The same
Doubled
Quartered
Quadrupled
An open inductor has
Zero resistance and infinite inductance
Infinite resistance and zero inductance
Infinite resistance and infinite inductance
Zero resistance and zero inductance
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
High resistance values are a consequence of the ___ of the film.
Thickness
Length
Thinness
Area
Which of the following is the peakiest?
Square wave
Sinusoidal wave
Triangular wave
Rectangular wave
What can be used to estimate resonant frequency and to find reactance at any frequency for any value of capacitor or inductor?
Smith chart
Reactance chart
Impedance chart
Resonance chart
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
If an emf in circuit A produces a current in circuit Ba then the same emf in circuit Bproduces the same current in circuit ? this theorem is known as
Maximum power transfer theorem
Millman�s theorem
Reciprocity theorem
Norton�s theorem
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
A linear circuit is one whose parameters
Change with change in voltage
Change with change in current
Do not change with voltage and current
Change with change in voltage and current
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
A series RLCcircuit has a ______ power factor at its half-power points
Unity
Leading
Lagging
Either B or C
For a parallel ACcircuita ___ is used as a reference phasor.
Voltage
Power
Current
Resistance
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
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 farad is not equivalent to which of the following combination of units
CV2
C2/J
C/V
J/V2
In an ac circuita the power dissipated as heat depends on
Impedance
Capacitive reactance
Resistance
Inductive reactance
A series RLCcircuit consists of a 10 resistor in series with L = 10 Ha and C= 100 F. Determine a new value of Ia for which the resonant frequency is one ±half the original value.
40 H
40 mH
40 pH
40 nH
The curve between current and frequency is termed as
Voltage curve
Gain curve
Power curve
Resonance curve
In a multiple capacitora the plate area is
Increased
The same
Decreased
Variable
What is the peak factor for alternating current or voltage varying sinusiodally?
A 0.09 microfarad capacitor is charged to 220 volts. How long in milliseconds will it discharged resistor has a resistance of 20a000 ohms?
According to Gauss theorema flux can be equated to
Charge
Field intensity
Current
Voltage
What is the resonant frequency of a circuit when L of 3 microhenrys and C of 40 picofarads are in series?
14.5 kHz
145 MHz
14.5 MHz
145 kHz
The graph between an alternating quantity and time is called
Sine wave
Curve
Waveform
A plot
Which of the following represents the energy stored in a cap
CV2/2
2Q2/C
C2/V
CV
The hot resistance of an incandescent lamp is about ___ times its cold resistance.