The temperature-resistance coefficient of pure gold is
Correct Answer :
A.
Related Questions
Parallel resonant circuit is sometimes called as
Acceptor circuit
Rejector circuit
Inductive circuit
Capacitive circuit
Kirchhoff�s laws (KCL and KVL) are applicable to
DCcircuits
ACcircuits
DC as well as AC circuits
Passive networks alone
Which one of the following elements serves as a protection against overload?
Fuse
Switch
Resistor
Relay
As applied to a series RLCcircuita bandwidth means
The frequency range for maximum power transfer
The difference between the highest and lowest frequencies of the oscillator
The separation of the half-power points
The frequency at which XL= XC
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
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
The farad is not equivalent to which of the following combination of units
CV2
C2/J
C/V
J/V2
It is impossible to change the voltage across a capacitor instantlya as this would produce ___ current.
Infinite
Zero
Low
High
Barium-strontium titanite dielectric material is also called
Ceramic
Polyster
Electrolytic
Bakelite
Conventional flow assumes charges flow from
Positive to negative
Positive to positive
Negative to positive
Negative to negative
The ratio of maximum value to the effective value of an alternating quantity is called
Form factor
Peak factor
Dynamic factor
Leakage factor
High resistance values are a consequence of the ___ of the film.
Thickness
Length
Thinness
Area
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)
An inductive load always has a ___ power factor
Leading
Lagging
Zero
Unity
In calculating maximum instantaneous power ___ voltage or current is used.
Peak
Average
Rms
Instantaneous
Effects of capacitance
It opposes any change in the amount of voltage
Voltage is lagged behind the current by a quarter cycle
Electric energy is stored in the capacitor in the form of electrostatic field
All of the above
The voltage cannot be exactly in phase with the current in a circuit that contains
Only capacitance
Only resistance
Inductance and capacitance
Inductancea capacitance and resistance
A capacitor is used to
Block dc current
Pass dc current
Open voltage source
Short the voltage source
What theorem is generally used in the analysis of vacuum tubes?
Superposition theorem
Millman�s theorem
Thevenin�s theorem
Norton�s theorem
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
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
A lead conductor has a resistance of 25 at 0 �C. Determine its resistance at -30 �C
Capacitance increase with
Larger plate area and less distance between plates
Larger plate area and greater distance between plates
Smaller plate area and less distance between plates
Higher values of applied voltage
In an RL series circuita
Current lags voltage by less than 90�
Current lags voltage by 180�
Current lags voltage by 90�
Current leads voltage by 90�
The Q-factor of a parallel resonant circuit is also known as
Current magnification factor
Voltage magnification factor
Load factor
Leakage factor
A factor that states how much the resistance changes for a change in temperature?
Resistivity
Specific resistance
Coefficient of temperature change
Temperature coefficient of resistance
In a resonant circuita if Q ? 10 resonant frequency _______ bandwidth.
Bisects
Exceeds
Is less than
Is equal to
In a pure capacitancea
Current leads voltage by 90�
Current leads voltage by 180�
Current lags voltage by 90�
Current lags voltage by 180�
The graph between an alternating quantity and time is called
Sine wave
Curve
Waveform
A plot
Which of the following does not refer to electrical energy?
Volt-ampere
Joule
Watt-second
Volt-coulomb