What rating of a resistor determines its ability to absorb heat?
Wattage
Ohmic
Current
Voltage
Correct Answer :
A. Wattage
Related Questions
What is considered as the most important value of a sine wave?
Effective value
Peak value
Average value
Instantaneous value
Which of the following represents the energy stored in a cap
CV2/2
2Q2/C
C2/V
CV
In a pure capacitancea
Current leads voltage by 90�
Current leads voltage by 180�
Current lags voltage by 90�
Current lags voltage by 180�
What is the hot resistance of a 100 Wa 220 V incandescent lamp?
What is the resonant frequency of a circuit when L of 25 microhenrys and C of 10 picofarads are in parallel?
10.1 kHz
10.1 MHz
101 MHz
101 kHz
Under the conditions of maximum power transfera a voltage source is delivering a power of 15 W to the load. What is the power generated by the source?
60 W
30 W
15 W
4 W
Refers to the outward-curving distortion of the lines of force near the edges of two parallel metal plates that form a capacitor.
Skin effect
Night effect
Edge effect
Hall effect
A coil of inductance L has an inductive reactance of XLin an ac circuit in which the effective current is I. The coil is made from a superconducting material. The rate at which power is dissipated in the coil is
I2XL
IXL
IXL2
The presence of an electric current is made known by
Electric shock
Effects produced
Magnetic shock
Flashing
The symbol Q refers to
Resonance quotient
Quality factor
Power quotient
Qualification test
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
VL= VCin a series RLCcircuit when
The value of the impedance is minimum
The power factor is zero
The current leads the total voltage by 90�
The total voltage is zero
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
An open resistor when checked with an ohmmeter reads
Zero
Infinite
High but within the tolerance
Low but not zero
A resistor wound with a wire doubled back on itself to reduce the inductance.
Bifilar resistor
Wire-wound resistor
Anti-inductive resistor
Bleeder resistor
Which of the following does not refer to electrical energy?
Volt-ampere
Joule
Watt-second
Volt-coulomb
A gang capacitor is a variable capacitor in which capacitance is varied by changing the
Dielectric
Number of plates
Plate area
Distance between plates
Voltage resonance means
Series resonance
Parallel resonance
Current magnification
Gain magnification
Which of the following capacitors are used only in dc circuits?
Mica
Ceramic
Mylar
Electrolytic
For a parallel ACcircuita ___ is used as a reference phasor.
Voltage
Power
Current
Resistance
Which of the following is a preferred resistor value?
43a000
54a321
A capacitor consists of two
Conductors only
Dielectric only
Conductors separated by a dielectric
Dielectric separated by a conductor
Which of the following has negative temperature coefficient?
Carbon
Nickel
Brass
Constantan
In the 5-band method of capacitor color codinga the first band indicates
Temperature coefficient
Tolerance
1stdigit
Capacitance value
In a multiple capacitora the plate area is
Increased
The same
Decreased
Variable
An open inductor has
Zero resistance and infinite inductance
Infinite resistance and zero inductance
Infinite resistance and infinite inductance
Zero resistance and zero inductance
What is a closed path made of several branches of the network called?
Junction
Node
Terminal
Loop
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
The farad is not equivalent to which of the following combination of units
CV2
C2/J
C/V
J/V2