Related Questions
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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
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
As applied to a series RLCcircuita bandwidth means
A. The frequency range for maximum power transfer
B. The difference between the highest and lowest frequencies of the oscillator
C. The separation of the half-power points
D. The frequency at which XL= XC
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4
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.
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4
A capacitor is used to
D. Short the voltage source
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Which of the following is a disadvantage of a wire-wound resistor?
A. It has reactance in radio-frequency circuits
B. It cannot handle much power
C. It draws a large amount of current
D. It cannot handle high voltage
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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 curve between current and frequency is termed as
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If the capacitance of mica capacitor is 5 times the capacitcitora then the relative permittivity of mica is
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What rating of a resistor determines its ability to absorb heat?
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Form its definitiona the unit of electric fielda is the N/C and equivalent unit of is the
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4
A tank circuit is a
D. A non-resonant circuit
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Which of the following elements is active?
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The power factor of a circuit is equal to
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A circuit whose parameters change with voltage or current.
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A 0.09 microfarad capacitor is charged to 220 volts. How long in milliseconds will it discharged resistor has a resistance of 20a000 ohms?
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Which of the following dielectric materials makes the lowest-capacitance capacitor?
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What maximum voltage can be applied across the capacitor of time?
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If resonant frequency is 10 kHz and quality factor is 50a then
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Which of the following has a positive temperature coefficient?
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Which of the following materials has the lowest dielectric strength?
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The presence of an electric current is made known by
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What is the peak factor for alternating current or voltage varying sinusiodally?
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What is the resonant frequency of a circuit when L of 25 microhenrys and C of 10 picofarads are in parallel?
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4
An open resistor when checked with an ohmmeter reads
C. High but within the tolerance
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A factor that states how much the resistance changes for a change in temperature?
C. Coefficient of temperature change
D. Temperature coefficient of resistance
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4
What theorem is usually used in the analysis of transistor circuit?
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Kirchhoff�s laws (KCL and KVL) are applicable to
C. DC as well as AC circuits
D. Passive networks alone
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The wavelength of an alternating waveform depends upon the ___ of the variation.