Form its definitiona the unit of electric fielda is the N/C and equivalent unit of is the
V(m)2
V(m)
V/m2
V/m
Correct Answer :
D. V/m
Related Questions
An open resistor when checked with an ohmmeter reads
Zero
Infinite
High but within the tolerance
Low but not zero
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
The graph between an alternating quantity and time is called
Sine wave
Curve
Waveform
A plot
If resonant frequency is 10 kHz and quality factor is 50a then
Bandwidth is 200 Hz
XL= is 50a000
R is 50
XC= is 50a000
Voltage resonance means
Series resonance
Parallel resonance
Current magnification
Gain magnification
A capacitive load always has a ______ power facto
Leading
Lagging
Zero
Unity
The wavelength of an alternating waveform depends upon the ___ of the variation.
Period
Number
Frequency
Amplitude
When current and voltage arte in phase in an ac circuita the ___ is equal to zero.
Resistance
Reactance
Inductance
Capacitance
The temperature-resistance coefficient of pure gold is
Permeability is otherwise known as
Magnetic conductivity
Magnetic susceptibility
Electric conductivity
Electric susceptibility
Which of the following is a way of decreasing mutual inductance?
Moving the coils closer
Moving the coils apart
Decreasing the number of turns of either coil
Increasing the number of turns of either coil
What is the specific resistance of a pure germanium?
55 -cm
55 -m
55 -mm
55 k -m
The internal resistance of an ideal voltage source is
Infinite
Equal to the load resistance
Zero
To be determined
What is the peak factor of a triangular wave?
A term used to express the amount of electrical energy stored in electrostatic field.
Joules
Coulombs
Watts
Electron-volt
For a series circuita the higher the quality factor
The greater the bandwidth
The narrower the passband
The broader the resonance curve
The wider the passband
When voltage is applied across a ceramic dielectric the electrostatic field p roduced is 50 times greater than air dielectric. The dielectric constant of ceramic therefore is
A rheostat is a form of
Variable resistor
Variable capacitor
Potentiometer
Thermocouple
If a capacitor is rated for 200V dca what is its effective ac working voltage?
50 V
100 V
200 V
400 V
For a series ACcircuita ___ is not used as a reference phasor.
Voltage
Impedance
Current
Conductance
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
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
Metal tin becomes superconductor at approximately
6 K
3.7 K
5 K
4.7K
Which of the following is the statement of Ohm�s law?
Electric current is directly proportional to both voltage and resistance
Electric current varies directly as the voltage and inversely as the resistance
Electrical power is directly proportional to the resistance and inversely as the current squared
Electrical power is directly proportional to both voltage squared and the resistance
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
For a linear circuita ___ voltage or current is used to calculate average power.
Rms
Peak
Average
Instantaneous
The ratio of maximum value to the effective value of an alternating quantity is called
Form factor
Peak factor
Dynamic factor
Leakage factor
If two complex conjugates are addeda ___ components results.
In-phase
Quadrature
Complex
Outof-phase
Of the equivalent combination of unitsa which one is not equal to watt?
2/V
AV
A2
J/s
In dividing or multiplying phasor quantitiesa ___ form is used.
Polar
Rectangular
Trigonometric
Exponential