electronics-inductors Related Question Answers

101. XL = 2fL



102. The primary and secondary are in phase.



103. Lenz's law states that the current induced in a circuit due to a change in the magnetic field is so directed as to oppose the change in flux or to exert a mechanical force opposing the motion.



104. The output of the secondary winding is 15 V.



105. For inductions in series, LT = L1 + L2 + L3 +...



106. Maximum power will transfer across a transformer when the primary impedance equals the secondary impedance.



107. Increasing the inductance value in an ac inductive circuit will lower the circuit current.



108. A magnetic field results whenever a current flows through a conductor.



109. All the schematic symbols shown in the given figure are variable inductors.



110. Self-inductance is the property that causes an electromotive force to be produced in a conductor.



111. The total inductance in the given circuit is 0.6 mH.



112. Inductors connected in series will increase the total inductance value.



113. Inductors are not as versatile as capacitors.



114. An ac generator will produce a constant waveform.



115. The current through an inductor in a parallel RL circuit leads the current through the resistor.



116. An RL filter could be a high-pass or a low-pass filter.



117. Faraday's law states that the polarity of induced voltage in a coil is in opposition to the current change through that coil.



118. A transformer can be designed to step up or step down dc voltage.



119. After a voltage has been applied to an inductor, the current will be ___ of its full value after 2 time constants.





120. The ___ of a coil is the inherent resistance of the wire.





121. The inductive reactance of L2 is _____ in the given circuit.





122. ___ power represents the energy dissipated at a given point in time.





123. After the first time constant, a transient current has changed by _______________ %, leaving _______________ % remaining.





124. The total inductive reactance is ___ in the given circuit.





125. The inductance value of L3 in the given figure is _____ if the total inductance is 340 mH.





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