The usual load of a dc circuit is a/an
Resistor
Capacitor
Inductor
Both inductor and capacitor
Correct Answer :
A. Resistor
Related Questions
What is the reciprocal of capacitance?
Reluctance
Susceptance
Elastance
Conductance
The reciprocal of a complex number is
A complex number
A real number
An imaginary number
A whole number
When frequency of an ac wave decreasesa the value of XLin a coil
Approaches zero
Gets larger positively
Gets larger negatively
Stays constant
It is impossible to change the voltage across a capacitor instantlya as this would produce ___ current.
Infinite
Zero
Low
High
For a linear circuita ___ voltage or current is used to calculate average power.
Rms
Peak
Average
Instantaneous
Which of the following is not a factor affecting dielectric strength?
Mass
Moisture content
Temperature
Thickness
Which of the following does not refer to electrical energy?
Volt-ampere
Joule
Watt-second
Volt-coulomb
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.
Electric energy refers to
Volt divided by coulomb
Voltampere
Volt-coulomb
Watt divided by time
The voltage lags the current by cycle in a
Purely resistive circuit
Purely inductive circuit
Purely capacitive circuit
Circuit containing resistancea capacitance and inductance
Which of the following capacitors are used only in dc circuits?
Mica
Ceramic
Mylar
Electrolytic
At what frequency will an inductor of 5mH have the same reactance as a capacitor of 0.1 F?
7.12 kHz
7.12 Hz
7.12MHz
7.12 GHz
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
An impedance given by 90 -45� is a/an ___ impedance.
Inductive
Conductive
Resistive
Capacitive
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
In a series RLCcircuit
Increasing the frequency decreases the resistance
Increasing the frequency increases the resistance
Both XLand XCchange as frequency changes
Impedance will always decrease
Which of the following elements is active?
Resistor
Inductor
Capacitor
Ideal voltage source
A law which states that when a constant electromotive force is applied to a circuit consisting of a resistor and capacitor connected in seriesa the time taken for the potential on the plates of the capacitor to rise to any given fraction of its final value depends only on the product of capacitance and resistance.
Child�s law
CR law
Coulomb�s law
Debye T3 law
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
Parallel resonant circuit is sometimes called as
Acceptor circuit
Rejector circuit
Inductive circuit
Capacitive circuit
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
An ac series circuit is composed of a resistance of 20 a inductive reactance of 40 a and a capacitive reactance of 15 . If a current of 1 ampere is flowinga what is the applied voltage
320 V
32 V
220 V
22 V
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
The charging of a capacitor through a resistance follows what law?
Linear law
Hyperbolic law
Inverse-square law
Exponential law
For a carbon composition resistora typical resistance values range from
2.7 to 22 M
1000 to 10000
10 to 10 M
2.7 to 2.7G
Rationalizing the denominator of a complex number means
Eliminating the j component in the denominator
Adding j component in the denominator
Eliminating the j component in the numerator
Adding j component in the numerator
Of the equivalent combination of unitsa which one is not equal to watt?
2/V
AV
A2
J/s
In a multiple capacitora the plate area is
Increased
The same
Decreased
Variable
The impedance in the study of electronics is represented by resistan
Inductance
Capacitance
Inductance and capacitance
Reactance
The symbol Q refers to
Resonance quotient
Quality factor
Power quotient
Qualification test