Related Questions
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4
Inductive reactance applies only to sine waves because it
A. Increases with lower frequencies
B. Increases with lower inductance
C. Depends on the factor 2
D. Decreases with higher frequencies
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4
Leakage resistance in a capacitor results into
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4
What is the purpose of a load in an electric circuit?
A. To increase the circuit current
B. To decrease the circuit current
C. To utilize electrical energy
D. To make the circuit complete
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4
Electric energy refers to
A. Volt divided by coulomb
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4
Conventional flow assumes charges flow from
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4
Two capacitors of capacitance 9 F and 18 F in series will have a total capacitance of
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4
Capacitance increase with
A. Larger plate area and less distance between plates
B. Larger plate area and greater distance between plates
C. Smaller plate area and less distance between plates
D. Higher values of applied voltage
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4
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?
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4
Property of an electric circuit that dissipates electric energy
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Why are inductance and capacitance not relevant in a dc circuit?
A. Because it is a simple circuit
B. Because dc circuits require only resistance as load
C. Because they do not exist in a dc circuit
D. Because frequency of dc is zero
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4
Which of the following is also known as antiresonant circuit?
A. Parallel resonant circuit
B. Series resonant circuit
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4
The arc across a switch when it open an RL circuit is a result of the
A. Large self-induced voltage across L
C. Low resistance of the open switch
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4
Which statement is true about a passive circuit?
A. A circuit with neither a source of current nor a source of potential difference
B. A circuit with a voltage source
C. A circuit with a current source
D. A circuit with only resistance as a load
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The resistance of an insulator ___ when its temperature is increased.
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What can be used to estimate resonant frequency and to find reactance at any frequency for any value of capacitor or inductor?
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In calculating maximum instantaneous power ___ voltage or current is used.
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A resistor wound with a wire doubled back on itself to reduce the inductance.
C. Anti-inductive resistor
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If three 100-pF capacitors are connected in seriesa then the total capacitance is
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4
What is the other name of relative permittivity?
D. Specific inductance capacity
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4
Form its definitiona the unit of electric fielda is the N/C and equivalent unit of is the
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4
Rationalizing the denominator of a complex number means
A. Eliminating the j component in the denominator
B. Adding j component in the denominator
C. Eliminating the j component in the numerator
D. Adding j component in the numerator
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4
If two equal resistances connected in series across a certain supply are now connected in parallel across the same supplya the power produced will be _____ that of series connection
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The ratio of the flux density to the electric field intensity in the dielectric is called
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What is the conductance of a circuit having three 10 resistors in parallel?
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A capacitance of 6 ��F means
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What refers to such work at very low temperaturesa near absolute zero?
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What dielectric is generally employed by a variable capacitor?
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For greater accuracya the value of phase angle should be determined from
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How many degrees of phase represents one full cycle?
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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