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
Correct Answer :
B. Resistive branch current is 90° out of phase with the inductive branch current
Related Questions
Leakage resistance in a capacitor results into
Internal heating
Internal bleeding
Shorter useful life
Short-circuiting
The current is ____ times the maximum current at half-power points of a resonance curve.
Which of the following is not a factor affecting capacitance oor?
Area of plates
Number of plates
Distance between plates
Dielectric material used
The ratio between the reactive power and the apparent power of an ac load is called
Quality factor
Power factor
Power ratio
Reactive power
When current and voltage arte in phase in an ac circuita the ___ is equal to zero.
Resistance
Reactance
Inductance
Capacitance
The charge in the capacitor is stored at the
Terminals
Plates
Dielectric
Air
High resistance values are a consequence of the ___ of the film.
Thickness
Length
Thinness
Area
The ratio of maximum value to the effective value of an alternating quantity is called
Form factor
Peak factor
Dynamic factor
Leakage factor
Which waveform in which the rms value and the mean value are equal?
Square wave
Triangular wave
Sine wave
Sawtooth
Barium-strontium titanite dielectric material is also called
Ceramic
Polyster
Electrolytic
Bakelite
If the output resistance of a voltage source is 4 a it internal resistance should be
Infinite
For a carbon composition resistora typical resistance values range from
2.7 to 22 M
1000 to 10000
10 to 10 M
2.7 to 2.7G
The Q-factor of a parallel resonant circuit is also known as
Current magnification factor
Voltage magnification factor
Load factor
Leakage factor
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 internal resistance of an ideal current source is
Infinite
Zero
Equal to the load resistance
To be determined
An inductor carries 2 A dc. If its inductance is 100 Ha then what is its inductive reactance?
Zero
1.3 k
According to Gauss theorema flux can be equated to
Charge
Field intensity
Current
Voltage
Which of the following has a positive temperature coefficient?
Mica
Manganin
Silicon
Carbon
In a circuita a passive element is one which
Supplies energy
Receives energy
Both supplies and receives energy
Attenuates signal
In an ac circuit with XL and R in seriesa the
Voltages across R and XL are in phase
Voltage across R lags the voltage across XLby 90°
Voltages across R and XL are 180° outof-phase
Voltage across R leads the voltage across XLby 90°
What does a capacitor store?
Voltage
Charge
Current
Power
Which of the following materials has the lowest dielectric strength?
Glass
Paper
Mica
Teflon
What is expected when two 20 k a 1 watt resistor in parallel are use instead of one 10 k a 1 watt?
Provides higher current
Provides less power
Provides more power
Provides wider tolerance
Why are inductance and capacitance not relevant in a dc circuit?
Because it is a simple circuit
Because dc circuits require only resistance as load
Because they do not exist in a dc circuit
Because frequency of dc is zero
How many coulombs are delivered by a storage battery in 25 hours if it is supplying current at the rate of 3 A?
2.592 x 105C
2.592 x 103 C
2.592 x 108 C
2.592 x 1012 C
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)
If the inductance is decreaseda the impedance of the circuit containing a resistor a capacitor and an inductor connected in series to an ac source
Decreases
Increases
Decreases or increases
Decreasesa increases or remains the same
Which of the following dielectric materials makes the highest-capacitance capacitor?
Air
Barium-strontium titanite
Mica
Electrolyte
Permeability is otherwise known as
Magnetic conductivity
Magnetic susceptibility
Electric conductivity
Electric susceptibility
Which of the following elements is active?
Resistor
Inductor
Capacitor
Ideal voltage source