Related Questions
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4
An inductor carries 2 A dc. If its inductance is 100 Ha then what is its inductive reactance?
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4
In an ac circuit with XL and R in seriesa the
A. Voltages across R and XL are in phase
B. Voltage across R lags the voltage across XLby 90°
C. Voltages across R and XL are 180° outof-phase
D. Voltage across R leads the voltage across XLby 90°
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4
At parallel resonancea the currents flowing through L and C are
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4
The Q-factor of a parallel resonant circuit is also known as
A. Current magnification factor
B. Voltage magnification factor
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4
Which of the following is a way of decreasing mutual inductance?
A. Moving the coils closer
B. Moving the coils apart
C. Decreasing the number of turns of either coil
D. Increasing the number of turns of either coil
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4
The Q-factor of a parallel resonant circuit is also known as
A. Voltage magnification factor
B. Current magnification factor
C. Gain magnification factor
D. Resonance magnification factor
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4
The average value of a triangular or sawtooth wave is _____ times its peak value.
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The resistance of an insulator ___ when its temperature is increased.
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For a carbon composition resistora typical resistance values range from
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An electric circuit contains
C. Both active and passive elements
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A real current source has
A. Infinite internal resistance
B. Zero internal resistance
C. Large internal resistance
D. Small internal resistance
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4
An inductive circuit of resistance 16.5 and inductance of 0.14 H takes a current of 25 ?. if the frequency is 50 Hza find the supply voltage.
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Which of the following dielectric materials makes the lowest-capacitance capacitor?
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4
If a multiplate capacitor has 10 platesa each of area 10 cm2a then
A. 10 capacitors will be in parallel
B. 10 capacitors will be in series
C. 9 capacitors will be in parallel
D. 9 capacitors will be in series
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Which of the following elements is active?
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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
With double the number of turns by the same length and areaa the inductance is
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4
The presence of an electric current is made known by
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4
Property of an electric circuit that dissipates electric energy
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The temperature-resistance coefficient of pure gold is
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The ___ of an alternating quantity is defined as the fractional part of a period or cycle through which the quantity has advanced from selected origin.
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What theorem is usually used in the analysis of transistor circuit?
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An impedance given by 90 -45� is a/an ___ impedance.
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Refers to the outward-curving distortion of the lines of force near the edges of two parallel metal plates that form a capacitor.
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The distance between the capacitor plates increases two timesa then its capacitance
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4
In a parallel bank with unequal branch resistances
A. The highest R has the highest I
B. The lowest R has the highest V
C. The lowest R has the highest V
D. The highest R has the highest V
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4
What is the temperature coefficient of the resistance Eureka?
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4
The charge in the capacitor is stored at the
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4
The voltage cannot be exactly in phase with the current in a circuit that contains
C. Inductance and capacitance
D. Inductancea capacitance and resistance
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What dielectric is generally employed by a variable capacitor?