Electric energy refers to
Volt divided by coulomb
Voltampere
Volt-coulomb
Watt divided by time
Correct Answer :
C. Volt-coulomb
Related Questions
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
A series RLCcircuit has a ______ power factor at its half-power points
Unity
Leading
Lagging
Either B or C
If a multiplate capacitor has 10 platesa each of area 10 cm2a then
10 capacitors will be in parallel
10 capacitors will be in series
9 capacitors will be in parallel
9 capacitors will be in series
If a coil has a Q of 10a it means that
The energy stored in the magnetic field of the coil is 10 times the energy wasted in its resistance
The energy wasted in its resistance is 10 times the energy stored in the magnetic field of the coil
It is a low Q coil
It is a high Q coil
What maximum voltage can be applied across the capacitor of time?
Working voltage
Surge voltage
Stray voltage
Peak voltage
If two complex conjugates are addeda ___ components results.
In-phase
Quadrature
Complex
Outof-phase
When two complex conjugates are subtracteda the result is a
Quadrature component only
Complex component
In-phase component
Real component
Which of the following combination of length and cross-sectional area will give a certain volume of copper the least resistance?
2L and1/2 A
Does not matter because the volume of copper remains the same
L and A
½ L and 2 A
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
What is the form factor of a triangular wave?
If the capacitance of mica capacitor is 5 times the capacitcitora then the relative permittivity of mica is
Inductive reactance applies only to sine waves because it
Increases with lower frequencies
Increases with lower inductance
Depends on the factor 2
Decreases with higher frequencies
A real current source has
Infinite internal resistance
Zero internal resistance
Large internal resistance
Small internal resistance
The curve between current and frequency is termed as
Voltage curve
Gain curve
Power curve
Resonance curve
What is a rotating vector whose projection can represent either current or voltage in an ac circuit?
Polar diagram
Scalar quantity
Velocity
Phasor
The wavelength of an alternating waveform depends upon the ___ of the variation.
Period
Number
Frequency
Amplitude
In a series RLCcircuit
The current lags VLby 90�
The current leads VLby 90�
XL leads Xcby 90�
Z = jXL at resonance
The maximum power transfer theorem is used in
Power system
Electronic system
Refrigeration
Air conditioning
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 0.09 microfarad capacitor is charged to 220 volts. How long in milliseconds will it discharged resistor has a resistance of 20a000 ohms?
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 statement is true?
A series resonant circuit is of high impedance
A parallel resonant circuit is of low impedance
A series resonant circuit is inductive if it operates at a frequency higher than the resonant frequency
A parallel resonant circuit is inductive if it operates at a frequency higher than the resonant frequency
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
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
A capacitive load always has a ______ power facto
Leading
Lagging
Zero
Unity
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
The electric field strength between capacitor plates has a unit
Volts per meter
Volts per mil
Amperes per meter
Amperes per mil
The presence of an electric current is made known by
Electric shock
Effects produced
Magnetic shock
Flashing
In an inductive coila the rate of rise of current is maximum
Near the final maximum value of current
At midvalue of current
At half-power points
After one time constant
Which of the following is not considered a physical factor affecting resistance?
Length
Material type
Temperature
Cross-sectional