Of the equivalent combination of unitsa which one is not equal to watt?
2/V
AV
A2
J/s
Correct Answer :
A. 2/V
Related Questions
What is the peak factor for alternating current or voltage varying sinusiodally?
The open-circuit voltage at the terminal of load RL is 60V. Under the condition of maximum power transfera the load voltage will be
60 V
15 V
20 V
30 V
What is the peak factor of a triangular wave?
In an ac circuit with inductive reactance ?, the
Phase angle of the circuit is always 45�
Voltage across the inductance must be 90� out o f-phase witht he applied voltage
Current through the inductance lags its induced voltage by 90�
Current through the inductance and voltage across it are180� outof-phase
The presence of an electric current is made known by
Electric shock
Effects produced
Magnetic shock
Flashing
A series RLCcircuit has a ______ power factor at its half-power points
Unity
Leading
Lagging
Either B or C
When resistance are connected in parallela the total resistance is
Less than the smallest resistance in the connection
Greater than the smallest resistance in the connection
Between the smallest and greatest resistance in the connection
Increasing and decreasing depending upon the supply voltage
³Any resistance R in a branch of a network in which a current I is flowing can be replaced by a voltage equal to IR�. This states
Compensation theorem
Reciprocity theorem
Millman�s theorem
Superposition theorem
When capacitors are connected in seriesa the total capacitance is
Smaller than the smallest capacitor
Smaller than the largest capacitor
Greater than any of the capacitor
Greater than the largest capacitor
Which of the following is not a factor affecting capacitance oor?
Area of plates
Number of plates
Distance between plates
Dielectric material used
The resistance of an insulator ___ when its temperature is increased.
Decreases
Remains the same
Increases
Varies
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
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
An intermittent and non-symmetrical alternating current like that obtained from the secondary winding of an induction coil
Faradic current
Transient ac current
Inductive current
Capacitive current
Which of the following has a positive temperature coefficient?
Mica
Manganin
Silicon
Carbon
Two complex numbers or phasors are said to be conjugate if they
Differ only in the algebraic sign of their quadratic components
Differ only in the algebraic sign of their real components
Are equal in their real and quadrature components including alge
Are equal in their real components but differ in their quadrature components i ncluding algebraic signs.
What fusion of elements is without chemical action between them?
Mixture
Compound
Alloy
Ionization
Which of the following is not a factor affecting dielectric strength?
Mass
Moisture content
Temperature
Thickness
What rating of a resistor determines its ability to absorb heat?
Wattage
Ohmic
Current
Voltage
When frequency of an ac wave decreasesa the value of XLin a coil
Approaches zero
Gets larger positively
Gets larger negatively
Stays constant
What refers to such work at very low temperaturesa near absolute zero?
Cryogenics
Superconductivity
Subsonic
Thermionic
A capacitance of 6 ��F means
6 pF
6 nF
6 fF
6 aF
Property of an electric circuit that dissipates electric energy
Reactance
Impedance
Resistance
Conductance
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
For maximum power transfera what is the relation between load resistance RL and internal resistance R of the voltage source?
RL= 2 r
RL= 1.5 r
RL= r
RL= 3 r
What is the specific resistance of a pure germanium?
55 -cm
55 -m
55 -mm
55 k -m
Which of the following is the peakiest?
Square wave
Sinusoidal wave
Triangular wave
Rectangular wave
A series-parallel combination of identical resistors will
Increase the power rating compared with one resistor alone
Increase the voltage rating compared with one resistor alone
Reduce the voltage rating compared with resistor alone
Result in an expensive circuit
Liquids that are good conductors because of ionization are called
Electrolytic
Bases
Acid
Electrolytes
What determines the magnitude of electric current?
The rate at which electrons are produced
The type of material used
The current carrying capacity of the circuit
The rate at which electrons pass a given point